Was the sale for no more than $250k ($500k MFJ)? If so, was a certification submitted to the buyer/agent to ascertain your client's eligible to exclude the gain in full under §121?
If the answer is yes to both, your client shouldn't expect to receive a 1099-S and the sale wouldn't have to be reported unless your client decides to forego the exclusion on this former home in anticipation of taking an exclusion on a new principal residence.
If the answer to either is no or your client receive a 1099-S in spite of the above, the sale will need to be reported on F.8949 (and F.4797 if it was formerly rented or used for business). See this article for more info: https://proconnect.intuit.com/community/help-articles/help/entering-a-sale-of-home-with-section-121-...
Still an AllStar