It depends. If you and your ex-spouse agreed to split the interest, then yes. You can each enter half of the interest. It does not have to be exactly half, as long as the total between the 2 of you equals the total amount on the 1098, that is acceptable.
When you enter your portion of the interest from the 1098 into TurboTax Online, check the box that says "the interest amount I entered is different than what's on my 1098."
