Mortgage interest on primary homes

I bought a new primary residence in Mar 2021. The sale of my previous primary home did not close until June 2021. So for about 3 months I owned 2 houses.

 

1. Is the 1098 interest fully deductible for both houses? (the orig loan amt on the new house is $750K and the orig loan amt on the old house was $500K)

 

2. When I list them on turboTax, do I list them both as primary residences?