Paying late Social Security and Medicare

What?  What happened?  Why are you only asking about your SS and Medicare for those years?  Normally those are withheld by your employer; or if you were self-employed you paid it when you paid your Self-Employment tax.  How could you only need to take care of SS and Medicare--but not tax returns for those two years?

Did you not report self employment income?  Do you need to amend your returns to add it?