It looks to me like the software interface is glitchy. I have the same scenario as the rest of these people (renting out some rooms, needing to take only the fraction of the deduction). When you are on the page called "Review Your Rental Property Info" and you go in to edit the "Situations" section and check off rented "Part of Home" there were times that it asked "Do you want to calculate [this] yourself" and if you selected for turbo tax to do the calculation it would then prompt to enter the percentage of the home rented. But the majority of the time it would NOT give that page. The only way I could get it back was by deleting the rental and starting over and selecting ONLY "Part of the Home". I just bit the bullet and will enter the correct deduction amounts myself.
Bottom line is that this is an ongoing issue. Seems to be a software issue and is going to be problematic for lots of folks who just trust the software to be correct and didn't learn the tax rules themselves and do the calculations on their own. They are going to get larger refunds than they should have and if audited will be an issue.
Spoke to customer support today and was told that in order to "get my answer" to navigating the software I would need to upgrade to live (+$100) despite the issue being a software issue and not a tax question issue.
Turbotax, can you address this?
