Home mortgage interest. You can deduct home mortgage interest on the first
$750,000 ($375,000 if married filing separately) of indebtedness.
最高可以抵扣$750,000的利息支出,
大部分的人利息都沒有那麼高,
所以大部分的利息都可以抵扣退稅
As of 2021, California property owners may deduct up to $10,000 of their
property taxes from their federal income tax if they are filing as single or
married filing jointly.
還有最高可以抵扣$10,000 的房屋稅