If you’ve missed your deadline by a few days: don’t panic. Most tax offices understand if you miss the deadline by only a couple of days.
However, if it becomes clear in advance that you won’t be able to make the deadline – for example in cases of prolonged illness or because you are still lacking some important documents – you can apply for an extension. You can do this by writing a letter or E-Mail to the responsible tax office, outlining the reasons for the delayed filing.
If the tax office does not receive your tax declaration or an application for an extension, they will normally send you a notification requesting that you file within a certain time period.
You should not miss the deadline mentioned in this request. If you do, you may face a penalty fee for late filing.