Enter information about lump sum or recurring pensions. Do not enter information about Social Security benefits or retirement accounts, such as 401k or Roth accounts -- there are other areas to enter that information.
If you are currently receiving the pension, enter the full annual amount you are currently receiving with the current year as the starting year.
If your pension will start part way through the first year, so you will not receive the full annual amount in the first year, enter as two separate pensions. Use one pension to enter the first year amount and then use the second pension for the full annual amount, setting the start year for the year following the first. For example, if your $50,000 per year pension starts halfway through 2030, create one pension starting in 2030 with a Lump Sum of $25,000 and a second pension starting in 2031 with an Annual Amount of $50,000.