@yurigul , In general and as a US person ( Citizen/ GreenCard ) , you can always use the "resourced by treaty" for amelioration of double taxation effect.
Under Deductions and Credits tab, you choose " I will choose what I work on" and find from the list of deductions/credits " Foreign Tax Credit", select this. This will open the "step-by-step" questions etc. for filling out the worksheet for form 1116. Select " Resourced b y Treaty", enter your US pension gross income ( before taxes by either US or Germany . This will then allow the computation of the foreign tax credit for US purposes.
Note that your FTC is limited to the lesser of actual taxes paid to Germany ( in your case ) or that imposed by the USA on the same & doubly taxed income.
Is there more I can do for you ?
pk
