How to correct a Dutch tax return

What does it mean to correct a Dutch tax return?

You change a return that is already with the Belastingdienst.

Which route you take depends on how far the Belastingdienst has got with your return. You change the return yourself, you object to an assessment or you report a correction voluntarily.

Three things sit just outside this page. We walk you through filing a return from scratch on how a Dutch tax return works. Asking for more time to file is a separate request with its own deadline. And a VAT error goes through a supplementary VAT return, which follows its own rules³.

Take Tomás. He filed through the tax return app in April. Two months later he realised his Portuguese savings account was missing from it. No assessment has arrived yet.

Where does your own return stand right now?

Which route fits your situation?

Your assessment decides which of the three routes is yours.

Wrong or incomplete figures and no assessment yet? You go back into the return and change them yourself¹. Disagree with an assessment that has arrived? You object within six weeks of the date on it². Income or assets that were never declared and can no longer go into the return? You report them voluntarily.

Look at what has come in from the Belastingdienst. Nothing yet means the return is still yours to change. A provisional assessment is an estimate, not the end of the road. We explain how a provisional assessment works on the provisional assessment. A final assessment starts the objection clock and leaves the return itself open¹.

Tomás sits in the first group. His return is in and nothing has been assessed, so he can open it again himself.

The route is one half of the answer. The window is the other half. Once the five-year window has passed, the return can no longer carry a correction. The partner split has a window of its own.

How long can a return still be corrected?

You can go back five years to change your own income tax return¹.

The count runs from the year the return covers, not from the day you filed it¹.

The Belastingdienst has a time limit of its own as well. It can correct a return up to five years after the tax period⁴. For foreign income or assets that limit runs to twelve years⁴.

One window is much shorter and easy to miss. Do you have a fiscal partner? That is the person the Belastingdienst treats as your partner for tax. You can still change how joint income and deductions sit between you, until six weeks after both final assessments¹.

So the windows are clear. What does changing a return actually involve?

How do you change a return you have already filed?

You open the return again in Mijn Belastingdienst with your DigiD¹.

Adjust the figures, save the return and file it again. The new return replaces the one you filed first¹.

Filing through the tax return app does not change this. App entries cannot be edited, so the correction runs through Mijn Belastingdienst as well¹. Filed on paper? Ask for a new form and file the return again¹.

Back to Tomás. His savings account belongs in Box 3, so he opens the filed return again in Mijn Belastingdienst. He adds the account to his Box 3 figures and files the return again¹. We set out what belongs in Box 3 on Box 3 assets. The assessment then follows from the new figures.

Not every correction is this straightforward.

What if the assessment is already final?

Even after a final assessment you can still change the return itself¹.

What a final assessment does is add objection as a route. You have six weeks from the date printed on the assessment, the dagtekening². The letter itself says where to send your objection². An objection is not a complaint about the outcome. It is a request to look at the figures again.

A separate route covers income or assets that were never declared. It applies once the return itself can no longer carry the correction. You report them yourself on a Belastingdienst form called Melding vrijwillige verbetering (voluntary correction report), which exists only in Dutch. It covers income tax, inheritance tax and gift tax⁵. Coming forward yourself before the Belastingdienst finds out normally counts in your favour.

This route stays open only while the Belastingdienst does not already know or suspect the income or assets⁵. That is why it is the route to have checked before you use it, not after. We look at what you declared, what is missing and which route the rules leave open.

Each route asks something different of you. Which one applies is rarely a free choice. For Tomás it is easy because no assessment has arrived yet.

What does this mean for your own return?

Start by working out which route your assessment leaves open.

Has nothing arrived from the Belastingdienst? Then the figures are still yours to adjust. An assessment that has just arrived starts the six-week objection window². An older assessment that can no longer carry the correction points to the voluntary route.

A correction is also a good moment to look wider. You have one conversation and we look at your full situation: the return, the assessment and anything the correction touches.

If you would rather hand the filing itself over, that runs through our tax return service. To see how the system fits together, start at the Dutch tax system or at help with your tax return.