I have the same question!
Originally, I left it blank and went through to put in the details and while there is a section for rental income and other deductions there isn't a section for unadjusted basis of assets. It's not clear what your supposed to do here at all!
I remember I paid $200 for live help for this last year and TBH it sounded like the person who was helping me wasn't sure what the answer was... I think this is a major flaw / error in turbo tax. We need help with this ASAP!
