For example, the interest I paid for this two family house was 10k. Since half goes to rental, so I entered 5k for rental deduction. Now I'd like to enter the rest 5k to my personal Federal Deduction. However, if I enter 5k in Box 1, the amount won't match my 1098 form (which is the whole amount of 10 k). Should I: 1) enter 5k for Box 1 in the Federal Deduction tab, and check the box stating "interest amount different than what's on 1098; or should I enter 10k here to match my 1098 form? Thanks.