Thank you.
Actually, it looks like that, as far as mortgage interest and local taxes are concerned, I am/we/TurboTax are making this allocation: days rented vs personal days vs rental conversion much more complicated than should be.
At the end of the Section on Expenses for Rental Properties, we are given the option of allocating the mortgage interest and local taxes using either the Tax Court Method vs. the IRS Method, with the explanation that "... Under the Tax Court formula, interest and taxes are allocated on a daily basis, that is, the rental portion is the ratio of days rented to the number of days in the year. Under the IRS formula, interest and taxes are allocated in the ratio of days rented to days used., The Tax Court ratio results in a smaller amount of interest and taxes allocated to the rental property". So for allocating taxes and mortgage interest using the Tax Court formula, only the number of days rented and the 365 days of the year are the numbers that are relevant.
