Retirement tax questions

If you have other income that doesn't fit on any of the other lines offered on Schedule 1, you can report it on Part 1 Line 8z.  Navigate to Federal > Wages & Income > Less Common Income > Miscellaneous Income, 1099-A, 1099-C.  You'll be asked Any Other Taxable Income?, answer yes, then continue to the next screen to enter a description and the amount.