BHirshc,
As
https://www.hrblock.com/expat-tax-preparation/resource-center/country/germany/participating-in-the-g...
notes, this is treaty related and not the general case for all ex-pats. For your case, I would omit the SSA-1099 as it is not taxable income. If that concerns you because you had medicare payments and/or federal income tax withheld, you could also enter $0 for your social security benefit. I tested this and it allowed it and it flew right through the Federal Review.
