Adding to post: using Pub 936 for 2017 since CA does not conform to the federal $750,000 limit, they still allow the $1,000,000 limit on mortgages and $100,000 on home equity debt.
Mortgage interest
- Federal law limits deductions for home mortgage interest on mortgages up to $750,000 ($375,000 for married filing separately) for loans taken out after December 15, 2017 and no longer allows interest on equity debt.
- California allows deductions for home mortgage interest on mortgages up to $1 million plus up to $100,000 in equity debt.
https://www.ftb.ca.gov/about-ftb/newsroom/tax-news/march-2019/tax-deduction.html
