Distribution from Roth TSP in 2022 1040 being handled a regular income by TurboTax Premierfor 2022

I used TurboTax Premier to calculate and submit my 1040 for 2022.  I received a letter from the IRS I had seveal errors on my 2022 return input and that I owe $.  One of the errors relates to a distribution from a Roth TSP account that I held and contributed to for 9 years until I retired (again) in 2022.  The 1099R from TSP shows the distribution ($8171.48) taxable amount of $0.00 in block 2a of the 1099R yet TurboTax 2022 adds the distribution to my Adjusted Income?