If he is receiving a pension then he should have received a Form 1099-R for the pension income received in 2020. If he is still working as an employee then he should have received a W-2 for his 2020 wages.
Both the Form 1099-R and the W-2 are entered on a tax return in the Wages & Income section of the TurboTax program.
Enter w-2 in the Search box located in the upper right of the program screen. Click on Jump to w-2
Enter 1099-r in the Search box located in the upper right of the program screen. Click on Jump to 1099-R
