@LenaF 

What amount shows on Sch 3, line 12e?  Click on the green link on the left side to get to the worksheet & follow the numbers (IF you are really using Lacerte).

Michele is correct; not ALL of the SE tax could be deferred.  Only 1/2 of SS (not Medicare) and then restricted by any existing overpayments

Also look at page two of Sch SE.