Can I still amend an income tax return I have submitted?
Yes. You can usually correct your own mistake or missing information for up to five years after the tax year. First check whether you can make the correction yourself, whether the Belastingdienst has already changed the return, and whether a separate objection or tax-partner deadline applies.
What would you like help with?
Detailed explanation, checklist and sources
Dutch tax return 2025: help with filling it in
Prepare your Dutch income tax return for 2025. Choose your situation for explanations of 26 fields, examples, document checks and a downloadable guide.
On this page
1. Which mistake do you need to correct?
This guidance concerns your own Dutch income tax return. Compare the submitted return with your annual records and identify exactly which entry is wrong or incomplete. A mistake in your return is different from a disagreement about a change made by the Belastingdienst. Check whether you have already received an assessment or a letter explaining a departure from your return.
2. Submit the amended return online
In Mijn Belastingdienst, open the correct tax year and the amendment option. Check the entire return, amend the relevant information, then sign and submit it again. Saving alone is not enough. You also amend a return originally submitted using the app through Mijn Belastingdienst. The Belastingdienst processes the most recently received return.
3. Which deadline applies?
You can usually correct a return for up to five years after the tax year, including after receiving a final assessment. For the 2021 tax year, this means no later than 31 December 2026. A letter requesting an amendment must be received in time. Allocation between tax partners has a different, shorter deadline; use the separate guidance for this. If an objection deadline is running, do not wait for a correction to be processed.
4. When do you need a letter?
For a paper return, you can send a complete replacement form or an amendment letter. If the Belastingdienst has changed your return itself, you may be unable to amend the information yourself and may need a written request for revision. Include your name, address, sending date, tax year, the mistake and the reason for the change; sign the letter. Check your tax office's address using the official source.
5. Keep a clear record
Keep the old and new versions, relevant supporting documents and the receipt confirmation. For each amended entry, record the old amount, the correct amount and the basis for your correction. Do not attach your entire financial administration without a specific reason. The preparation tool below creates your own record; it is not a tax return or evidence that the Belastingdienst has received anything.
6. Your next step
Choose the appropriate route: an online correction, a paper amendment or a review of a dispute about the assessment. The draft letter below only supports the written amendment described here. It does not replace a timely notice of objection. If an assessment, deadline or partner allocation is unclear, you can request help through our own assistance form; send documents yourself only after checking them.
Draft letter: amendment or revision of my tax return
Use this only where a written correction is appropriate. Complete the brackets, check the tax office's address and sign. A dispute about an assessment may require a timely objection; this letter does not protect that deadline. The text stays on your device until you download or send it yourself.
Edit your draftWord
Your edits stay on this page and are not automatically saved or sent. Complete every placeholder.
Is saving the return again the same as filing it again?
No. Complete the signing and submission steps again and keep the confirmation. A saved draft or downloaded PDF does not, by itself, prove a new submission.
Documents to prepare
Prepare your next stepFill in and save · Word
Tick what you have checked or collected. Note what is missing and take your overview to a meeting.
Unless saved in My overview: Your entries stay only on this screen. Download before leaving; closing or reloading clears them. Do not enter identity numbers, passwords or unnecessary personal details.
What do you still need for your next step?
Item 1 / 8 · Where do you stand with this item?
Tax year and original filing method
This overview follows your own answers. It does not assess your rights or guarantee that your file is complete.
Your choices stay here. Use the buttons below if you want to save or download.
View all details, notes and timeline
Your timeline and evidence
List events and contacts. Note where you keep the evidence; no upload is needed.
What goes in my timeline?
Record what happened, when, the response and where to find the letter, message or photo. Mark uncertain dates.
Is my evidence sent?
No. You only note where it is kept. No files are uploaded or sent automatically.
How do I save my timeline?
Your entries are not saved automatically. Choose Save and continue later to store this preparation, including your timeline, in My overview. Wait for confirmation and save new changes again. You can also download a Word file without an account.
Up to 20 events. Choose a different position for an event to change the order.
0 / 8 · Checked or collected
For each event, note the date, what happened and where the evidence is kept. Example: 3 October — letter received — correspondence folder.
Describe the solution you would like, such as an explanation of a deduction and repayment of the outstanding amount.
For example: which document is missing, who can provide it and what should I do first?
Record the date and its source. If unknown, note this and check promptly. This tool does not calculate or monitor deadlines.
After your conversation
These are your own notes. Confirm agreements with the other person; these notes do not prove their agreement.
This is your preparation, not a submitted request, objection or legally reviewed document. A tick records only your own progress. Check the procedure and deadline in the original letter.
Save and continue later
Clear entries
Download anything you want to keep first. Clearing cannot be undone.
- Tax year and original filing method
- Copy of the return and any assessment
- Incorrect entry, correct information and reason
- Evidence supporting the correction
- Applicable deadline and any objection deadline
- New complete version and receipt or proof of sending
Contact with a lawyer
You can use the chat and information without a phone number. A contact request requires a phone number, a verified email address and your wish for telephone contact. Our team assesses which partner fits your question. Data is shared only under the stated consent procedure. A partner or engagement is not guaranteed.
View the current application processSources
Need personal assistance? Request a lawyer through our chat. We explain the next step; submitting a request does not engage a lawyer. The links below support the legal information.
Belastingdienst · Verstuurde aangifte wijzigen ↗Sources may be in Dutch. General information about Dutch law, not individual legal advice.