I realized that I never came back and gave the final update, which is that the reason for the confusion is that this wasn't our partnership tax form!
(My husband is a partner in a company that is a kind of tech incubator. He does a lot of work with one of the companies in particular. This S-1 was the S-1 for the incubator as a partner in the one particular company, and it was not OUR S-1 which is for him as a partner in the incubator. Once I got the correct form with the correct amounts in the correct boxes, all of my problems went away.)
This comes about from a very annoying characteristic of TT and S1 forms, which is that it asks you vague questions which don't use the box numbers or the form language, so you have to guess what info to put into what box. If TT had said "name in box X" then it would have said "that's not you -- it's not your form!"
