I'm not sure if it's for penalty or what. It was prompted as:
"760c line 3 prior year tax liability must be enter", which reading from the previous post of @KathrynG3 it seems that I need to enter what is on line 18 of form 760 (Net amount of tax). But I do have a 760PY since I live only a part of the year, Would the line 19 (Total tax) on form 760PY be the equivalent?
