We explain amending a tax return in plain English, handle it correctly, and make sure you claim every relief you are entitled to, all at a fixed fee.
Amending a Tax Return
If you have made a mistake on a tax return, left something off, claimed too much or too little, it can usually be corrected, either by amending within the time limit or, for older years, by writing to HMRC, and doing it properly protects you and can secure a refund.
We review your return, make the correction the right way, whether an amendment or an overpayment relief claim for older years, and deal with HMRC, so errors are fixed cleanly and any tax you overpaid is recovered.
You can normally amend a return within about a year of the filing deadline, and for older years claim overpayment relief within four years, so mistakes, in your favour or HMRC's, can usually still be put right if acted on in time.
The Detail That Matters
If you made a mistake on a tax return, left something off, claimed too much or too little, it can usually be corrected: by amending within the time limit, or, for older years, by claiming overpayment relief. Doing it properly can secure a refund.
You can normally amend a Self Assessment within about 12 months of the filing deadline (so a 2023/24 return by 31 January 2026). Within that window, correcting an error is straightforward.
For years outside the amendment window, you can claim overpayment relief within four years of the end of the tax year where you overpaid, recovering tax through a formal claim.
Where the error means you overpaid, missed expenses or reliefs, we recover the tax, including for earlier years still in time, often a worthwhile refund.
Where the error means you underpaid, we disclose it correctly to HMRC, which usually results in lower penalties than if HMRC discovers it.
Mistakes on returns are common and usually fixable, but the method and time limits matter, and a proper disclosure of an underpayment reduces the penalty compared with HMRC finding it.
Key Figures
How We Help
We correct your return the proper way, an amendment within the time limit or an overpayment relief claim for older years.
Where the error means you overpaid, we recover the tax, including for earlier years still within the four-year window.
Where the error means you underpaid, we disclose it correctly to HMRC, which minimises penalties compared with HMRC finding it.
All the forms, calculations and correspondence handled on your behalf, so you never have to decode HMRC's rules or sit on hold.
A clear fixed fee quoted after a free call, your position explained in plain English, and never a surprise bill.
We act quickly, and where earlier years are involved we put those right too, reclaiming refunds or minimising penalties.
Mistakes on returns are common and usually fixable, but the method and time limits matter, and a proper disclosure of an underpayment reduces penalties. We correct it the right way and recover any overpaid tax.
Recent Client Outcome
A client realised they had missed claiming allowable expenses and reliefs on recent returns, overpaying tax.
What we did. We amended the year still within the amendment window and made an overpayment relief claim for the earlier years within the four-year limit.
The outcome. We recovered the overpaid tax across the years still in time, correcting the returns properly.
Using the right correction method for each year recovered tax they had overpaid through missed claims.
Why People Come to Us
Questions Answered
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