My husband died in 2023 and I get his pension now. Just enter the 1099R.
Enter a 1099R under
Federal Taxes
Wages & Income
Then scroll way down to Retirement Plans and Social Security
Then IRA, 401(k), Pension Plan Withdrawals (1099-R) – Click Start
It will show up on 1040 line 5a and the taxable amount on 5b.