Owning a home has no effect on your filing status. You cannot file a joint return if you are not legally married--home ownership does not entitle you to file a joint return. You each file as Single, or maybe one of you can file as Head of Household. Since you are not married, the child can only be claimed on ONE of your tax returns---the other parent should not enter anything at all about the child on their return.
As for home ownership:
CO-OWNING A HOME
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-credits-deductions/deduct-mortgage-i...
Go to Federal> Deductions and Credits> Your Home to enter mortgage interest, property taxes, and loan origination fees (“points”) that you paid in 2024 You should have a 1098 from your mortgage lender that shows this information. Lenders send these in January/early February.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
