You should be filing 2020 as a Joint return.  You should have received a 1099R for it.

Enter a 1099R under

Federal Taxes Tab or Personal (Home & Business)

Wages & Income at the top

Then scroll way down to Retirement Plans and Social Security,

Then IRA, 401(k), Pension Plans (1099R) - click Start or Revisit

If you are filing a Joint return be sure to pick which person it is for.

Don't enter the bank or broker name and don't try to import it.  It is just as fast and easy to manually enter it.  At the bottom pick -  Change How I enter my Form

Then on the next screen pick I'll Type it in Myself

If you don't have the Form 1099-R, you will have to contact Boeing, or whoever actually paid the retirement income, and ask for a duplicate copy.