Section C? Do you mean Schedule C? I don't think a K-1 goes to schedule C. K-1 box 14 goes to Schedule SE line 2. How do you know she paid the SS taxes on it if it didn't show up on Schedule SE? Was the self employment tax on Schedule 2 line 4 which goes to 1040 line 23?
Couple thoughts, First of all there is a 1 or 2 year lag for self employment income and SE tax to show up at the SSA. So it might not have posted yet. And make sure the K-1, Schedule C and Schedule SE are all assigned to the right person.
