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● Public sector — Tax case handler

AI agent for handlers of tax files

An assistant that carries out the preliminary assessment of claims, gathers the documents and prepares the replies — the handler keeps the analysis and the decision. Hosted in France — on local inference or an isolated resource — taxpayers' tax data never leaves the network. The AI agent assists, the handler decides and signs.

Hosted in France Tax confidentiality preserved GDPR & AI Act: governed deployment A human decision on every file

Updated on

Deployed in a few weeks
Tax files assistant · hosted in France
Do the preliminary assessment of this claim about property tax: the taxpayer is arguing an error in the floor area.
File summarised. The claim is admissible as to form (filed in time, claimant identified). The taxpayer encloses a floor-area certificate and a plan; the difference from the area on record is 18 m². Missing document: the title deed, mentioned but not enclosed.
A draft request for the document is prepared and the elements of analysis gathered — with no proposed decision.
⛓ Sourced · the file as submitted + the enclosures
Prepare the draft reply for the request for time to pay received yesterday.
Draft letter ready from your template: a reminder of the request, the documents produced (evidence of a drop in income), and the two possible outcomes left to your judgement — a payment plan or a reasoned refusal. The decision fields are empty, for you to complete.
To be read over, completed and signed.
✎ Action · draft ready to read over — the officer approves
Local inference · no data outside the EU
Data hosted in France
Sovereign by designLocal inference or hosting in France
GDPR & AI Act: governed deploymentTraceability & human oversight
TurnkeyDesigned, installed and operated for you
The officer decidesThe agent prepares the ground, it never decides
✦ In brief

A Blue Lemon Agent agent assists the handler of tax files with the repetitive tasks — preliminary assessment of claims and requests (relief, time to pay, updates to a taxpayer's situation), checking of supporting documents, reasoned draft replies — and flags the inconsistencies to be checked. It runs on local inference or is hosted in France on a dedicated and isolated resource: tax data is never exposed to a foreign service, architecture designed to reduce exposure to extraterritorial legislation, location alone not being enough to guarantee immunity. The legal analysis and the decision remain taken and signed by the handler. Live within a few weeks.

100%
hosted in France in the target architecture
0
transfer outside the EU in the target architecture
7
uses ready to deploy on this scope
0
decision taken without human approval

Reference points describing our offer, not results measured at a client. The scale of the gain is confirmed by a pilot on your own scope.

The context

Why AI matters to tax offices — and why they hesitate

Claims, requests for relief, time to pay, changes of circumstances: each file calls for gathering documents, checking time limits and giving reasons for a reply. Time is short, but the data handled is covered by tax confidentiality.

! The issue

The tax handler is caught between taxpayers who expect a prompt, reasoned reply and files whose assessment — documents, time limits, account positions — eats up time. Yet most consumer AI tools amount to entrusting taxpayers' income, assets and personal circumstances to a third party, often hosted outside Europe and subject to the Cloud Act.

Our answer

For data covered by tax confidentiality, AI is only of interest if it is sovereign and confidential by design. Local inference or an isolated resource hosted in France, systematic human oversight, the decision reserved for the handler: complex or ambiguous cases are systematically flagged for human examination, never settled by the machine. The aim is not to replace the handler, but to give them back time for analysis.

The decisive point

Protecting tax files: sovereignty & compliance

A tax office handles data covered by tax confidentiality: income, assets, family circumstances. Here is how the architecture of our agents protects it.

Local inference

The agent can run on a machine at the unit: no data leaves the network, nothing passes through a cloud.

Hosting in France

Otherwise, a dedicated and isolated resource, hosted in France under French law — the tax data: processing and access within the European Union targeted by the architecture.

Reduced extraterritorial exposure

Exposure of tax files to the Cloud Act and FISA 702 is reduced by design; location alone does not guarantee immunity.

One isolated resource per department

No pooling of data: an environment strictly dedicated to your unit, guaranteeing the continuity of the public service.

Encryption & controlled access

Encryption in transit and at rest, role-based access (RBAC), strong authentication and logging.

AI Act: governed deployment

The agent is strictly in support; no automated relief or refusal; traceability and human oversight from end to end.

What depends on the architecture chosen These points are not general guarantees: they are settled deployment by deployment, in the quotation.

  • The applicable location is that of the architecture set out in the quotation and verified before commissioning.
  • Local execution is announced only for the configuration explicitly described and accepted in the quotation.
  • The applicable isolation depends on the deployment mode set out in the quotation; no dedicated isolation is presumed.
  • The encryption mechanisms in transit and at rest, their components and key management are those documented for the architecture chosen.
  • Roles and permissions are configured and accepted for the identities and systems actually connected.
  • The events logged, their content, their retention period and who may access them are defined for the deployment chosen.
For the most sensitive data, SecNumCloud and HDS options are available depending on your requirements. A single architecture is designed to answer both the GDPR and extraterritorial exposure. Designed for deployment in line with the GDPR and the AI Act, after the processing, roles and context-specific risks have been assessed.
Demonstration

See the agent at work

5 real situations, taken from those that come up most often. Pick one: the exchange unfolds as it would in your organisation.

A scripted demonstration. These exchanges show how the agent behaves — its sources, its refusals, what it leaves to your teams. Nothing is sent from this page, no model is queried here, and the matters named are fictional. That is precisely what we promise your data.
The behaviours shown here — monitoring, automation rules, routing and reminders — are configured with you during deployment, from your tools, your rules and your thresholds.
The architecture points named in these exchanges — location, local execution, isolation, encryption, role-based access, logging — are not a guarantee attached to the demonstration: they are those of the architecture set out in your quotation, and verified before commissioning.

The public body in this demonstration

Fictional public body

Personal tax office of Vallonges — 68,400 tax households

Sector
Personal tax office — reception, case handling, contentious and discretionary claims, requests for time to pay; counter open 15 hours a week, telephone line 20 hours
Headcount
9 staff — one head of office, 5 case handlers, 2 reception officers, 1 collection officer; the claims rest on the 5 case handlers
Public served
68,400 tax households, of which 12,300 property owners — 4,900 enquiries a year at the counter, by telephone and through the secure messaging service
Order of magnitude
2,840 claims and requests a year — 1,620 contentious claims, 640 discretionary requests, 580 requests for time to pay; 160 heavy tax-relief files; five years of archived records
Tools in place
The office's case-handling applications, the taxpayer's secure messaging service, the online procedures platform and the office's reply templates — the agent plugs into them read-only, nothing is replaced and nothing is migrated
Who decides
The case handler examines, qualifies and signs; the head of office decides above the threshold he has set; the public accountant grants time to pay
Room for improvement
A claim waits 47 days for its first examination; 38 % of files filed go back with a request for a missing document; 214 requests for time to pay went more than thirty days without an answer; and 41 replies sent had to be redone after the taxpayer challenged them

Fictional public office, invented for the demonstration. At Vallonges, five case handlers examine 2,840 claims and requests a year, in an office where reception and collection already take up four people. Time is not slightly short, it is very short — and the data handled, income, assets and family circumstances, is covered by tax secrecy. The agent runs on local inference on a machine in the office, reads five years of files without ever writing to them, and lets no reply leave without a case handler's signature. The exchanges below span a year, from the overhaul of the claim causes to the review presented to the head of office.

This public body, its figures and the exchanges that follow were invented for the demonstration. They illustrate a common situation; they describe no real service.

Tax files assistant · hosted in France
I reread your last five financial years over the weekend — 14,200 files, 2,840 a year — and I have drawn out a finding your archives were carrying without anyone having the time to extract it.
A contentious claim challenges the basis or the amount of a tax; a discretionary request challenges nothing but asks for relief in view of the taxpayer's circumstances. Both are examined, but not with the same documents.
The gap measured, and it decides everything else: 1,180 of your 1,620 contentious claims come under just three causes — 73 %.
· Error of area or description on property tax: 612 claims a year. All of them are examined with the same three documents.
· Change of circumstances not taken into account — moving house, death, separation: 348.
· Double taxation on the same premises after a sale: 220.
What these 1,180 files have in common, and nobody had set it side by side: the decisive document is the same in 94 % of cases, and 7 times out of 10 it is already in the taxpayer's file or in yours by the time the claim arrives.
What that costs today:
· A claim waits 47 days for its first examination. The office has six months to rule, beyond which silence counts as rejection and opens the way to the courts47 days of waiting serve no one, neither the taxpayer nor the case handler.
· 38 % of the files filed go back with a request for a missing document, and each round trip costs the taxpayer three weeks.
· The preliminary examination of a routine claim accounts for 60 % of the file's time: 36 minutes out of the 60 that separate its arrival from the signed reply.
What I propose, and it is not a promise — it is already done: I carried out the preliminary examination of the 1,180 claims of the past year, as a dry run. Each comes back with its admissibility checked, its chronology, its documents dated, the gap measured and the missing documents named.
The time this shifts: the preliminary examination goes from 60 % to 10 % of the file's time — from 36 minutes to 6. Over 1,180 routine claims a year, that is 590 hours returning to the office.
The next step, and it takes one meeting: your head of office reads the three examination sheets I have written, cause by cause, with the number of files each one covers. He settles them, and they run on the claims that arrive on Mondaybringing them into service is the only act I leave to you. claim-causes_1180-files-out-of-1620.pdf3 causes behind 73 % of claims, each measured
⛓ Sourced · 5 financial years of office files, 14,200 claims and requests, log of examination times
There are five of us handling all that. I am not going to open three projects at once: where do we start?
With a single cause, not three — and I chose it on the number of files it frees up, not on its difficulty.
The ranking, with the count behind it:
· Property tax on an area error: 612 files a year, that is 38 % of your contentious claims on its own. Three documents are enough to examine it in 94 % of cases: the property record, the declaration of the premises' area, and the document the taxpayer produces — plan, surveyor's certificate or notarial deed.
· Change of circumstances: 348 files, four documents, and a cross-check against data the office already holds.
· Double taxation after a sale: 220 files, two documents, and it is the quickest cause to settle once the date of sale is established.
That property tax cause is also the one that costs the taxpayer most: of the 612 files, 287 led to tax relieftax relief is the discharge, whole or partial, of a tax wrongly leviedand those 287 taxpayers waited on average 94 days for money that was theirs.
What I do on top, and that nobody has time for: I did not merely sort the 612 files — I wrote the examination sheet for the cause, in the form of your office notes, with the order of the checks, the three required documents, the formula for the area gap and the two cases in which the cause does not apply. Then I ran it over the year's 612 files: it covers 578 with no intervention and sends 34 back to your judgement, all of them mixed-use premises.
You judge on a written and already tested sheet, not on an intentionand you correct it in one word, since it is your own material that I have set out clearly.
The next step I propose: let the sheet run on property tax claims for a fortnight, alongside your usual examination. You compare the two outputs file by file; if mine adds nothing, it stops at a word. On the 26 trial files already run, it found 4 documents the taxpayer had filed and that nobody had attached to the file. examination-sheet_property-tax-612-files.pdf3 documents, 578 files covered out of 612, 34 sent to the case handler
⛓ Sourced · count of claims by cause over 5 financial years, written examination sheet, 26 trial files
All of that assumes you read our taxpayers' income, assets and family circumstances. Where exactly do they go?
They go nowhere. I run on local inference on a machine in the office, and nothing I read leaves the network.
Local inference means the model computes on your own machine: a household's income line or the title deed of a property crosses no external network to be processed. If the office would rather not host a machine, the other route is an isolated resource hosted in France, dedicated to Vallongesno pooling with another office, which is the condition for the continuity of your activity.
What that changes, point by point:
· Taxpayer data trains no model, neither ours nor a third party's.
· I work read-only, and the technical account I read through has no right to writethis is not a promise, it is a permission that can be checked with one command, and your IT team will run it in front of you.
· Encryption in transit and at rest, role-based accessrights follow the job: the reception officer opens the status of a file, not a household's income. 9 roles for your 9 staff, and the log shows 0 out-of-role accesses since go-live.
· Hosting in France, under French law, architecture designed to reduce exposure to extraterritorial legislation, location alone not being enough to guarantee immunity.
And the point that decides, for an office whose every file is covered by tax secrecy: tax secrecy forbids disclosing to a third party what the administration knows about a taxpayer; it binds every officer, and it binds the tools they use. The access log is what lets you say, the day a taxpayer asks, exactly who opened their file, when and why. That is evidence your current tools did not give you, and it works in your favour.
The figure that sums all this up: 0 taxpayer data out of the office network across the 2,840 files of the year, and processing in the EU targeted.
What I propose: that I keep up to date the record your data protection officer will ask for — hosting, data processed, retention periods, who accesses what, and the exact permissions of the technical account. It is asked for once a year and takes two days to rebuild; the first version is written and you have it attached. technical-framework_where-tax-files-live.pdfLocal inference, read-only, processing in the EU targeted
✎ Framework · deployment architecture, technical account permissions, access log, first version of the processing record
Local inference · no data outside the EU

Your case is not here? That is exactly what a 15-minute conversation is for. Book the free audit

Use cases

The uses of AI in the handling of tax files

Each use corresponds to an agent we deploy. All of them work in support, subject to approval by the officer.

Included in your agent The 7 capabilities essential to this promise are included, at no extra cost.
From 1,035 € incl. VAT / month

Preliminary assessment of claims

Carry out the preliminary assessment of claims and requests (relief, time to pay, updates to a taxpayer's situation) and summarise each file.

Checking supporting documents

Gather and check the supporting documents in the files; flag those that are missing, out of date or inconsistent.

Reasoned draft replies

Prepare the draft replies and letters from your templates, submitted for the handler's analysis and signature.

Flagging inconsistencies

Spot the discrepancies between documents and declared circumstances and flag them for human checking — never an automatic decision.

Summarising complex files

Chronology, documents, amounts at stake: a summary you can check, so you approach each file with the full picture.

Answers to everyday questions

Inform taxpayers about progress and about the steps to take, 24/7, without taking up the handler's time.

Guidance to the online services

Guide the public through their online formalities on the tax administration's website and cut down incomplete paper files.

Controls and safeguards These 7 controls are built into the agent: they frame what it does, whatever plan you pick. They are not chosen and are not added to your order.
Human validation, exceptions and escalation Status, safe closure and audit trail Sources, access rights and handling of questions with no answer Prepare without deciding: sourced rules, supporting documents, anomalies and explanation Guarantee the decision, signature, recourse and responsibility of the public official Record versions, access, criteria, actions and notifications Test for bias, false positives, fundamental rights and continuity of service
Other needs our agents cover Each card says where the matching agent stands: available, on quote, or still being architected.

Accessibility and inclusion

To produce a plain-language version, prepare an easy-read transcript to the FALC method, translate or voice your content, this agent can be paired with the Accessibility and inclusion agent. None of these capabilities is included in what this offer covers as standard.

On quote View the agent page

Need to go further?

These agents handle a different business process, with their own owner and their own price. They are added to this one.

Does your need fall outside this?

In 15 minutes we identify the agent that will give your staff the most time back — without oversizing the project.

Book the free audit Build your agent
The gain

How much time can a tax handler recover?

By automating the assembling of files, the checking of documents and the preparation of draft replies, an office can aim for a clear reduction in preliminary-assessment time — reinvested in the analysis of complex situations.

Preliminary assessment of an ordinary claim
Today · done by hand
Prepared by the agent, to approve
A draft reply from a template
Today · done by hand
Near-instant
Assembling and checking a relief file
Today · done by hand
Prepared by the agent, to approve
Qualitative, non-contractual comparison: the proportions shown illustrate the shift of the work towards review, they represent no measurement. Every output of the agent is reviewed and approved by a competent person.
How it works

The stages of your AI agent project

1

Audit & scoping

15 minutes to target the use case with the best return.

2

Quote or direct sign-up

A catalogue offer is bought online; a specific need gets a costed quote.

3

Design

We design the agent and its guardrails.

4

Integration & testing

We connect your tools to the agent, which is itself hosted in France.

5

Rollout

Going live and training your team.

6

Operation

Continuous supervision and improvement.

Pricing

Three options, one agent

An agent for handling tax files (preliminary assessment, checking of documents, draft replies), installed and operated for you. Choose according to how you are organised and how demanding your security requirements are.

Agility

Setup + controlled subscription

11,945 € incl. VAT setup
then 1,035 € incl. VAT/month — you invest at installation and pay a reduced subscription. Ideal for keeping the cost under control over time.
  • Installation, configuration and training for your teams
  • Operation, human oversight, updates and support
  • Sovereign hosting in France, a dedicated and isolated resource
Order →
The simplest Serenity

All inclusive, no setup fee

1,700 € incl. VAT /month
all inclusive, immediate start. No upfront investment: a single subscription. Ideal for starting quickly and simply.
  • Setup included (installation, configuration, training)
  • Operation, human oversight, updates and support
  • Sovereign hosting in France, managed end to end
Order →
100% Sovereign

On site, you own it

16,981 € incl. VAT setup
then 1,295 € incl. VAT/month · + hardware from 2,989 € (one-off purchase, in addition) — a sovereign computer installed on your premises, maintained remotely. Models run locally, your data returned at the end of the contract. 36-month commitment.
  • Hardware installed on your premises (you own it)
  • French / European AI models run locally
  • Secure remote maintenance (Pro support included)
Order →
Not included in the packages: AI consumption (model tokens), re-invoiced at real cost with no margin, and tracked in real time in your client area. Maintenance and supervision subscription for an initial term of 12 months for the Agility package, 24 months for the Serenity package and 36 months for the 100% Sovereign package, renewable; support levels (SLA 72 h / 24 h / 4 h) optional. Bespoke development, additional integrations or exceptional volumes are quoted separately. Support Monday to Friday, 9am to 6pm. Prices include VAT at 20%: as a public body that is not VAT-registered, you cannot reclaim it.
AI model: none of the AI models offered currently carries a fixed surcharge. When the selected model carries a cost, that cost is shown when you choose it, before you order, and re-invoiced at the cost incurred, with no mark-up; usage is billed at the publisher's price. Publishers' prices are published in US dollars: the amount re-invoiced is the amount in euros actually borne by Blue Lemon Agent on the publisher's invoice, at that invoice's exchange rate, with no commission or mark-up.
Included components and additional components Components included in the base offer: the Blue Lemon Agent software foundation, the AI models listed in the order journey, the standard channels (Microsoft Teams, Slack, WhatsApp Business, email, website chat, calendars, Microsoft 365 / Google Workspace, file storage, market VoIP telephony, professional social-media pages and accounts, Google Business Profile), hosting in France for the package chosen, backups, supervision, updates and support. If adapting the AI agent to your constraints, your needs or your requests requires other paid components — a third-party publisher's software licence, paid API access to one of your applications, hosting of health data, for which French law requires an HDS-certified host (art. L. 1111-8 of the French Public Health Code), SecNumCloud-qualified hosting, a speech synthesis service, particular hardware —, they are offered to you as an option or on quotation and re-invoiced at the cost incurred; nothing is committed without your written agreement. Where the artificial intelligence model you choose entails an additional cost, that cost is shown to you before you order and re-invoiced to you at the cost incurred, with no margin.
What to expect
Go-live 2 to 3 weeks
Agent designed, channels connected, team trained.
Steady state 4 to 7 weeks
After a few weeks of real use, once the agent's behaviour matches what you expect. Indicative estimate, adjusted to the options you keep. It is not a delivery commitment.
Our commitment

Four guarantees that matter to a tax office

Tax files never leave the networkLocal inference or an isolated resource hosted in France; no data entrusted to a foreign third party.
Data in France, under French lawAs regards tax files: hosting in France under French law, architecture designed to reduce exposure to extraterritorial legislation, location alone not being enough to guarantee immunity.
The officer keeps the decisionThe AI agent prepares the ground and proposes; relief, refusal or time to pay remain human decisions, signed.
Human oversight & traceabilityMonitoring, updates and logging frame the preliminary assessment of claims, in line with the AI Act.
Frequently asked questions

Your questions, our answers

Does the agent handle claims on its own?
No: it prepares the ground and drafts; the legal analysis and the decision remain taken and signed by the handler.
How is the data protected?
Hosting in France under French law, an isolated resource, role-based access and logging, SecNumCloud options.
Does the agent grant relief?
No: it assesses and proposes; the decision to grant or refuse relief remains that of the officer with the authority.
How are complex cases handled?
They are flagged for human examination; the agent never settles an ambiguous situation on your behalf.
Does the agent state that it is an artificial intelligence?
Yes, from the very first interaction, and this is not a configuration option: since 2 August 2026, Article 50(1) of the European AI Regulation requires that any person interacting with an AI system be informed, unless this is obvious. The announcement is built into the greeting, in the other party’s language, and they can ask for a human at any time.
How long does it take to deploy an agent?
A few weeks as a rule, after a free audit that identifies the most useful use case, then a phase of design, integration and testing before going live.
Do we need a technical team to run it?
No: the agent is designed, installed and operated by us. Handlers use it from their usual environment, after a few hours of familiarisation.
Do we have to change software?
No. The agent complements your existing applications, with no migration imposed. The integration is defined at the design stage, respecting your security rules.
Let's talk

Let us estimate the potential in your service

A few minutes to identify the most useful use case — hosted in France, supervised, with no commitment.