Hi Folks,
Last year I change my 3a pillar from Postfinance/life insurence to Viac. Now I wanted to do my taxes and have realised that I misscalculated my deposits. It’s not much, just 100.- which I deposited to much. What I have to do now? Let pay back the 100.- or is it possible to take it over for 2025?
I miscalculated and deposited CHF 3 more because I had 2x 3a pillars. Got a letter from my bank to go there and get my CHF 3 back 
my problem is that I had 3 different provider at this time. Postfinance, Zurich insurence and Viac befor i transfered all to Viac. Because of that no one could notice that I paid to much. I think I will write and ask Viac what I can do about it.
When this happened to me, VIAC automatically sent the money back to me.
But it can’t hurt to reach out to them if they haven’t done that already / if they couldn’t know that you overpaid.
Declared properly, you will get a letter with your final tax bill that confirms that you’ve contributed too much. And with that letter you can request a withdrawal of the CHF 100 from VIAC.