I have mortgages that were inheritance. I receive interest from them. The principle is tax free. What forms are needed to file for end user and myself?

Delete 

If the installment sale was previously reported by the decedent, report the Interest Income you receive as if you had received a 1099-INT, under Interest & Dividends in the Wages & Income section. 

Here's more discussion on reporting interest from an Inherited Installment Sale.