Use the address you want the IRS to use if the IRS needs to send you a letter or a check.
And...no, if you closed on the house in 2026, you do not enter anything about it on your 2025 tax return. Next year when you prepare your 2026 tax return you can enter the 1098 you will get from your lender that shows the mortgage interest, loan origination points and property tax you paid.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
