Of course, communication with your tax office via email is also possible. As a rule, you can send all simple letters and applications (e.g. application to amend a tax assessment, enquiry about processing status, application for extension of deadline) or objections to tax assessments by email to your tax office.
Emails are similar to postcards in the postal service. Unauthorised persons may be able to read your emails. Encrypted email communication is currently not possible with the tax offices.
Please also note that emails to the tax office are sent at your own risk. SteuerGo cannot guarantee the security and integrity of the emails.