I am filing a partial year VA return. In checking the return, TT asks for 760PY INC: TP Sch E Income must be entered. Where can I find that information?

I think this refers to rental income/losses from our condo in DC.  Would we just split the total amount listed on Schedule E from our federal return based on the period of time we were  paid DC state taxes and VA state taxes?  We lived for approximately 25% of the year in VA.

Yes, that is the way to report your VA amount from Schedule E.