Deferred gains entry

[MoAnn]

Did 1031 exchange on property (A) to purchase property (B) and deferred capital gain of $10,000. Sold property (B). Where do I enter the original deferred gain of $10.000?

[MoAnn]

Not quite the answer that I was looking for. After I input all of the information on the sale of Property (B) Form 4797 was generated. Do I add the 10,000 to gross sales on  line 20?