My rental properties need your help

[Hermanie Pierre]

I have a few properties and I have a couple questions

My properties that are free and clear my cpa deduct Taxes, & insurance only for the year I had no expenses.

For the one I have a mortgage. He deduct my interest, insurance , depreciation & taxes

Is there anything else we can deduct.

For example if my mortgage is 1048 and I pay 1400 ( meaning I pay extra payments ) can we deduct all that from my payment I received from my tenants which is ( 1450 minus 10% management fees) Or just interest, insurance, depreciation and taxes.

I am trying to see if all I can maximize. I respect the fact we not cpa but any advice will be appreciated.