when do i have to do my tax return by

The standard deadline to file your Dutch income tax return is May 1st of the year following the tax year. For example, for the 2024 tax year, the deadline is May 1st, 2025. If you cannot file by this date, you can request an extension, usually until September 1st. If you live abroad, the deadline for filing or requesting an extension is July 1st. Filing before April 1st means you will be notified about your return before July 1st. Filing late may result in interest and fines.