Need to AMEND return to add AmeriCorps Segal Award, there is no place stating "Less Common Income" How can I AMEND my return when this options are not available?

Three weeks ago, I filed my return with MISC 1099 for AmeriCorps Segal Education Award and was charged a Self-Employment tax.  Today, someone told me that I should not have paid the Self-Employment tax, so I tried to AMEND my return. On the TurboTax site, the options to select  "Less Common Income" and "Other reportable incomes" are NOT available. When amending, there does not seem to be a work around for this. Help. Thanks.