@NYANIK when you went through the rental interview it asked if you wanted to enter actual or allow the program to do the expense allocation. These are numbers you should have entered:
Days of Personal Use - ZERO. Read the screen. It is number of days after it was converted to rental, not before.
Business Use Percentage. 100%.
Number of days Rented - count for this starts from the first day a rental was "in service" date or after if you were asked for that. Vacant periods between renters do not count for actual days rented. Please see IRS Publication927 page 17 at https://www.irs.gov/pub/irs-pdf/p527.pdf#en_US_2020_publink1000219175 Read the “Example” in the third column.
I normally just enter only related to the rental there and NOT the totals as not everything should be allocated based on number of days.
So you do need to enter it in both parts but only the % that was personal and do not allow the program to allocate for you.
Helpful information
https://turbotax.intuit.com/tax-tips/rental-property/real-estate-tax-and-rental-property/L3e09vT71
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