Hi 

No brothers, I didn't prepare the return I think I was referred by someone he knows and I do their return.

From what he is saying the address is correct as well as the last name, but first name and one number in the social security number is off.  He received the check as David and he is Daniel.

To do the 1040X I will need to use the incorrect name and Social and return the check with the correct name and social in the explanation, but how would it calculate to show he would receive the refund.