The last date for filing of tax declaration for the year 2019 has been delayed to 30 jun 2020 due to Corona Virus.

Here is the link for canton FRIBOURG.

https://www.fr.ch/scc/impots/personn...-avec-covid-19

I presume all cantons are doing something similar.

PLEASE CHECK FOR YOUR OWN CANTON

Zürich:
https://www.steueramt.zh.ch/internet...frist_ste.html

You can also extend it to nov30 (at least in Winterthur) online.

- like you can very year, but you‘ll be charged interest if you don‘t pay till the final bill the following year.

Too late. Did my return on VSTax and because I didn't have a password and though Sion promised to ring me back on my Natel they never did -- I am on self-isolation in London and unlikely to get back home to Valais anytime soon -- I printed out and posted the declaration via Royal Mail Tracked (arrived in Sion today) and uploaded via Tell Tax VS over 100 pages of documents including my IRS Form 1040. Since most of my income is from US sources IRS will want to tax it first and if the famous US Tax Court case (easily found online) Tiller v. Commissioner ("never mind that the French say they get to tax your US income first, we say the opposite"), affirmed on appeal, is any guide this will have to go to Competent Authority for resolution since I am a dual national. Haven't ever used the VS Tax software before, 2019 is my first (part) year as a resident.