Retirement tax questions

CantinaT1-

 

i did not itemize for my 2024 tax return with TurboTax.  For 2025, I am able itemize due to the large increase in deductible state and local taxes.  My 1099R for SS does not break out the amount I received in March 2025 as a lump sum resulting from elimination of WEP.  I divided the lump sum by 13 for the months the lump sum covered and then multiplied it by 11 for the 11 months in 2024 to get the lump sum for 2024.  I plugged that into the lump sum line on TurboTax and it seems to have dropped my taxes by about $800.  This does not sound right, but TurboTax is not importing my 2024 tax return like it has in previous years.  Am I doing this correctly?  Thank you.