tax on mortgage payments

What is the name of your state? New York
My brother bought my mother's house. My mother held the mortgage. My mother passed away and she left her remaining property to her three children meaning we all inherited the mortgage payment. My brother pays us our third of the mortgage payment. What tax, if any, do we pay on these payments. And if my brother sells the house, he is to pay off the mortgage in full, what tax if any are we to pay on this lump sum?

You pay taxes on the portion of the mortgage payment that is interest. Principal payments are not taxable.

Snipes