How are interest amounts split between a borrower and co-borrower? (home loan, loan)

[lei awapuhi]

I am a co-borrower on a home loan. The primary and I both live in the house and all mortgages are split down the middle. The 1098 that we received is addressed to the both of us. My question is...how do we proceed to split the interest on the payments for tax purposes? Is it 50/50 and do we need to go about it a certain way? I would really appreciate some help from someone who knows. This is my first time being faced with this situation. Thanks!

[ShaneSA]

I guess your filing seperate returns.
If everything is 50/50, then the interest and taxes would be 50/50. since the 1098 has both names on it, the IRS will see the split.

[lei awapuhi]

Thanks.