$40,000 of interest indicates a pretty hefty loan balance.....unless you are talking about two homes.
High balance loans have interest limitations, though $12,000 seems too small, I'm guessing your loan amount is over the limits, & you likely can't get the full 40k for one home.
What was the balance on that loan on 1Jan of 2020 ?
Read : https://ttlc.intuit.com/community/credits-and-deductions/help/can-i-deduct-my-mortgage/01/25755
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
