@tom-lueling , you have to tell us more about your situation in order for us to help you file an accurate return.
Starting with the basics:
(a) are you a US person ( citizen/GreenCard/Resident for Tax purposes )?
(b) if you are not a US person, then when did you enter the USA ?
(c) Are you employed by a US entity and in the US or by a foreign entity abroad ?
(d) Why is the question about earnings in CH ? Are you there currently ? If so , are you a US person working in Switzerland and for a local entity ? And if so when did you enter / establish taxhome in CH ?
Please answer my questions and I will circle back --yes ?
The more you tell, the better focussed the answer will be . I am assuming that you are talking about 2024 tax year --yes ?
pk