State and Local Taxes (SALT) has a upper imit of $10,000, SALT above this limit is not deductible.
Home Mortgage Interest deduction is limited to the interest of mortagage under $750,000. The home mortgage interest deduction has no limit. So if interest rate was 20% and your home mortgage was $100,000, the $20,000 of interest is deductible.
Of course, the above two deduction belongs to itemized deduction, which requires the deduction to be above standard deduction to even be elected. A standard deduction for a joint filer is 2 x 12000 = $24000.
So assuming your SALT deduciton is $10000, and your home mortgage interest has to be more than $14000 to have itemized deduction more than $24000 of the standrd deduction.
