Putting past years right
We set out what to correct in one or two past years and what it means for you, then file each year's late or substitute return.
Send us your request
We reply within 2 working days with the right service, its price and how to start.
In short
A first return filed after the filing window is late, and a return with an error is corrected with a substitute return. Before anything is filed, we set out what to correct and the consequences, such as a fine or interest, which depend on your facts. Then we prepare each year's return, you approve it, and we file it.
What decides it:
- how many years are affected, and what was missed or wrong in each;
- whether foreign income is involved;
- whether the tax authority has already written to you.
If a letter has already arrived with a deadline, see A letter from the tax authority.
What you get
- Advice on what to correct in one or two years, and the consequences.
- Each year's late or substitute return, prepared, approved by you and filed.
- Proof of each submission in your portal.
- A call with your adviser when your case needs it.
How it works
- After payment, you upload your documents in your portal, such as the returns already filed and the income records for each year.
- Your advice reaches your portal, signed by your adviser; we then send each return for your approval and file it, with the proof in your portal.
The dates that matter
The window for 2025 income closed on 30 June 2026: a first 2025 return filed after that date is late, except where the 31 December 2026 extension for undetermined foreign tax applies. The window for 2026 income opens on 1 April 2027.
What clients say
Taxbordr filed my Portuguese return and sent my US CPA a coordination summary that recovered foreign tax credits I had been leaving on the table for two years.
American cross-border client, Lisbon
From clients we have advised. Names withheld at their request.
Related guides
Questions
What if I have three or more years to correct?
Three or more years are quoted in our reply to your request.
