My current Mortgage is a refi from 2013. How do I answer the question Yes this is a loan I've refinanced or NO, this is the original loan. It is not the original loan?

You would answer yes as your loan is not on your original purchase, but is from a refinance. 

Another question will pop up below that asking for the type of loan it is.  Just answer that it is A mortgage loan that I've refinanced.