i tried out the mortgage interest issue on desktop deluxe using simulated data using a 2017 date for the refi and like you, indicated there was no cash out on the refi. the loan balance at the beginning of the year was $1.2 million and the balance at the end of the year was $1 million. turbotax should have averaged the balances and given me a deduction based on $1 million/ $1.1 million times the interest paid. it failed to average the balances and thus gave me a 100% deduction which is wrong. this appears to definitely be a bug that may have resulted in thousands of taxpayers overstating their mortgage interest deduction. Turbotax are you listenning
