The documents for the tax return are sent in January and February by the cantonal tax office. The initial deadline is March 15.
After receiving your documents, the initial deadline for filing your tax return is March 15.
As of May 25, taxpayers who have not yet filed their tax return or requested an extension will receive an information letter reminding them of the deadline of June 30, 2021 for filing their tax return.
However, it is possible to apply for an extension of the deadline to September 30 for filing your tax return.
You can make a request directly online with Fiduvaud by clicking HERE, you just need to have the first page of the documents transmitted by the cantonal tax office (Form of transmission of the declaration).