I'm not specifically familiar with swiss tax law but european taxes are typically far more simple than american taxes.
I have a relatively straightforward tax return and still found significant mistakes on 3 out of the last 4 years of returns filed by CPAs.
I did mine and my wife's. Mine is really easy but my wife's situation is a bit harder, because she both works as an employee and as a freelancer. Claude was able to make sense of the excel spreadsheet sent by the accountant, and to translate it into what was expected on the tax portal.
It beats the tax advisor we hired two years ago, who made a significant mistake.
> I'm not specifically familiar with swiss tax law but european taxes are typically far more simple than american taxes.
The German tax system is one of the most complicated one in the world.