CSF FORM 1099R

My 2023 CSF FORM 1099R has "UNKNOWN" in box 2a taxable amount and "UNKNOWN" in box 9b total employee contribution. My 2022 CSF FORM 1099R has "UNKNOWN" in box 2a taxable amount and "UNKNOWN" in box 9b total employee contribution. My 2021 CSF FORM 1099R has "UNKNOWN" in box 2a taxable amount and shows "64199" in box 9b total employee contribution. 

Last year 2022 my taxes were done by a CPA and they used in box 1 the gross distribution amount and in box 2a they placed an amount that was 10% less than in box 1 even though the 2022 CSF FORM 1099R stated "UNKNOWN" in box 2a taxable amount. What do I use this year 2023 for box 2a taxable amount. I am using TURBO TAX DELUXE download that I bought at Costco.