include everything that is on the K-1 is the best approach
20Y is informational and won't impact your return, but why not include everything that is on the K-1? Why decide to pick and choose which numbers to report?
Absolutely. Put all the numbers in and the tax program will actually be able to compute a gain or loss on a sale. You can enter it using the dropdown box on line 20 in the interview or the same thing if you enter using forms.