Social Security Tax for US Citizen Retired In Germany

I'm a US citizen and have been retired and living in Germany.  I receive Social Security benefits and turbo tax adds a percentage to my total income.  I recently received a check from the IRS because my 2020 1040 overstated my income by the amount of my SS Benefit being taxed.  It appears I don't pay tax on the amount I receive because I reside in Germany.  Wondering how to prevent from overpaying again but Turbo Tax doesn't have a way for me to enter $0 for the Taxable Amount of my SS benefits.  Any thoughts?