Use this guide to create a statement from IB for tax declaration → Interactive Brokers, which reports needed for tax declaration? - #2 by San_Francisco
In Switzerland you are only taxed on income such as dividends and coupon, capital gains are not taxed at all.
Don’t get a Steuerberater, they are expensive and also only cook with water. Learn to do it yourself once, abd then it gets easier and easier in the coming years. It’s not rocket science.