what would be my "allowable US Uniformed Services retirement benefit deduction" ?

I was in a Chapter 13 bankruptcy from 12/18/2020 and was concluded on 11/02/2023, so now I am doing my 2021 taxes I served 20+ years in the Military, my 2021 gross distribution/taxable amount was $25,126.32. what do I put for my allowable US Uniformed Services retirement benefit deduction?