3. What does one need to submit the tax return online?
If you want to submit your tax return online, you first need access to your canton's tax software. You will receive the corresponding access data (login with password) together with the tax return. Some cantons, for example the canton of Zurich, send taxpayers only the password letter to encourage them to submit their tax returns electronically.
Do you want to submit your tax return online? Then, in addition to your access data, you will also need all the documents required to complete the tax return in electronic form. While some documents (e.g. bank statements, salary statements) are already provided electronically, others must first be scanned.