Where do I find Nondeductible Expenses from Prior Year for Rental Property?

We have a vacation home that we rent out and use ourselves. In filling out Schedule E, the TurboTax screen (see below) asks for Nondeductible Expenses from Prior Year. I don't remember ever filling out this screen in the past. Yes, we do take a loss every year but I thought TurboTax automatically does the calculations for me. Guess not. Now I'm confused. What do the four entries (Operating Expenses, Depreciation Expenses, AMT Operating Expenses, and AMT Depreciation Expenses) mean? And where would I find the information to add to this screen? Thank you.

 

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