Before I file, I received some dividends on stock I own. I did not withdraw anything, just left it in the account. Do I need to add this to my taxes.

The stock is not part of an IRA.  Also, I started an installment sale in 2016 and it  still continues.  I sold the property at a loss.  Do I need to add the monthly payment that I receive to my taxes even though the money goes directly to pay the mortgage.