In 2021, I earned slightly over 120'000 CHF (mostly due to a lot of overtime and bonuses).
I still haven't received any notification from the tax authority to declare my taxes. From my understanding, the tax authority should contact me if my reported income is more than 120'000 CHF.
Should I contact the tax authority myself and request the tax forms myself? Is there any penalty if I won't do it?
If possible, I would prefer to stay on Quellensteuer.
It could be worth filling in a tax declaration as you can offset medical insurance, dentist / doctor bills, commute costs etc, and you might get some money back.
Through the periodic Quellensteuer process between your employer and the tax office, the tax office should be aware that your 2021 salary exceeded Fr. 120'000. The tax office should then place you on on the regular taxation list and send you a tax form for 2021. To speed up the process, you could also contact your local tax office to request a tax form for 2021.
According to my own experience (Zurich): give them a call and tell them what you wrote in the post, clarifying that you are waiting for them to send you the papers. They sometimes screw up and won't send you the papers automatically if you're on B.
There is an online tool on ZH website to do exactly this. You are actually obliged to do so if you hit other criteria for mandatory tax filing (e.g. 80k chf in assets) - I am not sure whether it is mandatory or not to do the same when you hit the 120k income threshold. I would do it, just to be safe - it's like 10 min to register on the website and press a couple of buttons