Where is the choice for IRS Method vs Tax Court Method for allocating property expenses? Can I switch between methods in different years or is the election permanent?

My question is two parts.  I'm trying to find where on TurboTax I am supposed to choose between IRS and the Tax Court methods for my vacation home property.  Also, I would like to know if I can switch to the Tax Court method even though I use the IRS method in past years for this particular property.  Thank you.