We co-own & pay our mortgage 50/50, so we're each deducting half the interest. Should we both check the box saying the amount entered is different than what's reported?

[KrisD · Accepted solution]

No, not if the numbers you claim on each return adds up to the total on the 1098. You both need to be listed on the loan, have made 1/2 the payments and the loan needs to be secured by the home. 

Make a copy of the 1098 so you have a copy for each return.