I have the same issue. I am using desktop version and checked the forms. TT tells me to put my entire deductible mortgage interest in easy step. This causes it to appear on line 10 and a calculation whereby I end up with a negative deduction. TT won't let me override the entry on the form. If I just put zero, it doesn't show the amount as excess interest. Why is it putting the amount on line 10 and calculating a negative deduction? And why can't I override it?
