@_Maria_ , I went through the above interactions including those of the year before and I am not sure where we are this year ----- what I get is that you a Russian citizen( yes? ), with Residency in the USA ( Green Card ? ) have had Post Doc scholarship from Germany and wanting to know whether this stipend/grant amount is taxable in the USA and how to report this. I saw @DaveF1006 's answer on this topic. Could you please reiterate your situation ( immigration status, citizenship, marital status, source of stipend, other earnings, employment/training/research -- school or private, etc. etc. ) and any changes from 2019, -please ?
