Are you facing a tax reassessment, or have you just received a notice of proposed adjustment? For a business, a company director, or an individual, this stage is often decisive: short deadlines, financial exposure, and the risk of penalties and collection measures. It rarely comes down to a single accounting line: it comes down to strategy, the quality of the supporting documents, and the strength of the arguments.
Yaël Sion LAWYERS & ASSOCIATES, a tax law firm in Marseille, assists businesses and taxpayers with the management, negotiation, and challenge of a tax reassessment, with a clear, rigorous, and solutions-driven approach.
Need a quick initial assessment? The firm works in Marseille and the surrounding area, and also remotely throughout France.
Tax reassessment: the key issue is not only the amount, but your response
A tax reassessment most often follows a tax audit (desk audit or in-depth audit), when the tax authorities believe certain items must be adjusted. At this point, the core question is very practical: how to respond, what to challenge, what to negotiate, and in what order.
The quality of the response (structure, evidence, consistency, timing) often determines:
- the outcome of the adversarial exchange,
- which adjustments are maintained or dropped,
- which penalties are applied,
- and what happens next (collection, appeals, negotiation, litigation).
Tip: as soon as you receive the letter, a strategic review helps avoid improvised answers and keeps deadlines under control.
Notice of proposed adjustment:
the first steps
A proposal for tax reassessment should be handled neither in haste nor blindly: the initial decisions shape the course of the audit, the level of risk involved, and the room for discussion with the tax authorities.
Secure deadlines and procedural framework
A notice of proposed adjustment must be answered within a regulated timeframe. Before addressing the merits, you should check the framework: type of procedure, scope, consistency of appendices, document requests, response schedule, and any formal irregularities.
Separate what is disputable from what must be explained
Not all adjustments should be handled the same way. Some require a legal challenge, others a factual justification (documents, timeline, accounting consistency), and others a negotiation approach (calibration, penalties, terms).
Organize documents and build a coherent case pleading
A reassessment is often won or lost on the ability to document a transaction, explain its economic rationale, and provide clear, consistent supporting evidence. A strong response is not a pile of documents: it is a structured file, which takes on its full significance during the pleading.
Challenging or negotiating a tax reassessment:
a structured method
Challenging or negotiating a tax reassessment requires a structured approach, combining legal, factual and strategic analysis, in order to secure the procedure, prioritise the arguments and preserve room for discussion with the tax authorities.
“Substance + procedure” analysis
- Substance: relevance of adjustments, legal characterization, economic rationale, accounting consistency, and supporting evidence.
- Procedure: taxpayer safeguards, formal requirements, consistency of reasoning, procedural defects and weaknesses in the tax authority’s construction of the case.
Designing a response strategy
Depending on the stakes and context, the strategy may aim to:
- eliminate certain heads of adjustment,
- reduce the amount maintained,
- neutralize or limit penalties,
- prepare the next steps (appeal, negotiation, litigation),
- protect business continuity if collection pressure arises.
A clear and actionable adversarial reply
The firm prepares a structured reply supported by documentation and arguments tailored to the case. The goal is twofold: respond effectively and secure a file that can be relied on if further appeal becomes necessary.
Collection measures, formal notice, third-party seizure: managing urgency and protecting cash flow
A reassessment can lead to collection action. When financial pressure becomes critical, the goal is to avoid reactive decisions and regain control: timing, written requests, payment strategy, and protective measures.
The firm can assist notably to:
- review the situation and collection letters,
- frame exchanges with the tax authorities,
- structure an appropriate request (depending on the case) to avoid destabilizing the business,
- support you in urgent situations or tight timelines.
Procedural defects and taxpayer guarantees: levers not to overlook
In tax matters, procedure is governed by strict requirements. Certain irregularities may provide defense levers when they affect taxpayer rights or the validity of exchanges. A rigorous review of formalities often helps strengthen the defense position and secure what follows.
Businesses: when legal support makes the difference
For businesses, a reassessment typically raises high-impact issues: transaction characterization, VAT/turnover consistency, deductibility of expenses, supporting documents, margins and ratios, accounting treatment of certain entries, and internal documentation. The objective is to produce a reliable, consistent response that is aligned with the reality of the activity.
The firm helps you prioritize issues, gather the right documentation, and secure a defensible position.
Assistance in case of a tax reassessment
Yaël Sion LAWYERS & ASSOCIATES, a tax law firm in Marseille, assists you at every stage with a pragmatic, results-oriented approach:
- From the first letter: strategic review, deadline control, risk mapping, and prioritization.
- During the adversarial phase: document structuring, drafted reply, and follow-up of exchanges.
- If disagreement remains: preparation of next steps (appeal, negotiation, litigation) and protection of financial interests.
- In urgent situations: review of collection action and response strategy.
Get in touch
Looking for a tax lawyer for a reassessment? Contact the firm for an initial assessment, in Marseille or remotely.
FAQ - Tax reassessment
Does a tax reassessment mean the tax authorities are necessarily right?
No. A notice of proposed adjustment reflects the tax authority’s position at a given moment. It can be discussed, explained, or challenged depending on the facts, supporting documents, and legal characterization.
Can a notice of proposed adjustment be challenged?
Yes. A structured, well-documented reply opens an adversarial exchange. Depending on the case, the goal may be to dismiss certain heads of adjustment, reduce the amounts, or limit penalties.
When should I contact a tax lawyer?
Ideally as soon as you receive the first letter. This helps secure deadlines, avoid communication mistakes, and build a strong case from the start.
Do you only assist businesses?
No. The firm supports businesses, company directors, and individuals facing a tax reassessment, depending on the nature of the case.
Do you only work in Marseille?
The firm is based in Marseille and also supports clients remotely throughout France, depending on your situation and the preferred meeting format.
What if the situation becomes urgent (collection action, cash-flow pressure)?
It is recommended to seek support quickly to frame exchanges, organize an appropriate response, and avoid reactive decisions. The firm can help you review the letters received and define a coherent strategy.
