<prompt> Human: Just what it says. My partner and I are going joint on a mortgage for a new home but remain unmarried and filing taxes separately. I know such things are done not infrequently but I dont know how the process works, how much it might complicate the matter and so forth. Thanks.  <response>: IRS employee here:Publication 936 is your reference, page 9:More than one borrower. If you and at least one other person other than your spouse if you file a joint return were liable for and paid interest on a mortgage that was for your home, and the other person received a Form 1098 showing the interest that was paid during the year, attach a statement to your return explaining this.Show how much of the interest each of you paid, and give the name and address of the person who received the form. Deduct your shareof the interest on Schedule A Form 1040, line 11, and print See attached next to the line.Also, deduct your share of any qualified mortgage insurance premiums on Schedule A Form 1040, line 13.Similarly, if you are the payer of record on a mortgage on which there are other borrowers entitled to a deduction for the interest shown onthe Form 1098 you received, deduct only your share of the interest on Schedule A Form 1040, line 10. Let each of the other borrowersknow what his or her share is.This is the tax year 2013 publication.Thank you for reading. 