Turn a tax letter into a clear little map.
Choose the letter that looks closest. We’ll help you see what HMRC says, which figures and dates matter, and what questions you may want to take to the right person.
Which HMRC letter is in front of you?
Type a word you can see—such as P800, tax code, penalty, assessment, check or overdue. Keep names, addresses, references and amounts out of this search.
HMRC tax code letter explained
A new or changed tax code, the figures behind it and what to compare with your own records.
Open this guide →2HMRC P800 letter explained
Why HMRC says you paid too much or too little tax, and the figures used to reach that result.
Open this guide →3HMRC Simple Assessment letter explained
A tax bill calculated by HMRC when the amount is not being dealt with through an ordinary tax return or PAYE route.
Open this guide →4HMRC Self Assessment penalty letter explained
Whether the notice concerns late filing, late payment or both—and the dates and appeal wording that matter.
Open this guide →5HMRC compliance check letter explained
What HMRC says it is checking, what information it has requested and which dates appear in the letter.
Open this guide →6HMRC overdue tax letter explained
The amount HMRC says is overdue, the reference and period it belongs to, and the contact or payment route shown.
Open this guide →Four gentle stops. No tax maze.
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Send the complete readable letter.
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We find the message, figures and dates.
Translate
Formal wording becomes everyday language.
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What feels difficult about the letter?
We begin with one sentence.
Your explanation starts with the main purpose of the letter before it moves into the detail.
Every stated date in one place.
We pull out response, payment, appeal and review dates written in the document and explain what the letter connects to each one.
Each figure gets its own label.
We separate tax, payment, refund, interest and penalty figures as the letter describes them. We do not recalculate or confirm they are correct.
Calm wording, without softening warnings.
We remove unnecessary complexity while keeping every important instruction, consequence and uncertainty intact.
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You receive the main message first, difficult terms in everyday words, stated dates and actions, a simple letter map and neutral questions for HMRC or a qualified adviser. An audio copy is available on request.
This is a document-explanation service—not tax, financial or legal advice. We do not check calculations, recommend a response, contact HMRC, file a return or act for you.
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