I’ve been asked to carry back a Purchase Money note for my Buyer, how does that Effect the Exchange?

A seller carry-back can be treated as an installment sale or may be deferrable upon certain conditions (call for an in-depth review). The important thing to remember is that the method of handling a carry-back will have important tax ramifications to the Exchanger and the options must be discussed and an action determined BEFORE THE SALE CLOSES.