2. Have all documents ready for filling out the application
The next step is to gather all the documents and data required to apply for an extension of the deadline. Depending on whether the extension has to be submitted by postal mail or online, the information required will be more or less extensive.
Example: In the city of Zurich, for example, the tax deadline extension can be applied for in three different ways. Written applications may be sent by postal mail to the tax office of the city of Zurich. If you submit your extension request online, you must provide two numbers (personal ID and document ID), both of which can be found on the first page of the tax return, and an e-mail address. It is even easier to scan the QR code printed on the tax return. In this case, the taxpayer is taken directly to the application form and the required information is filled in automatically.
Once you have gathererd all the relevant information, you can complete and submit the extension application.