A couple of clarifications:
You can deduct real estate tax on all the homes you own that are in the United States. You can deduct mortgage interest for only two homes.
For 2018 through 2025, the total deduction for state and local taxes is limited to a maximum of $10,000 per year ($5,000 if you are married filing separately). The maximum applies to the total of real estate tax, personal property tax, and either state and local income tax or state and local sales tax.
