My daughter and her boyfriend purchased a home in 2018, he already claimed the amount on the 1098 on his taxes, how do I answer the "Did you own a home in 2018?"

They purchased the home together so she does own a home, but does not have a 1098 to claim.  I think they should have slip the amount on the 1098 on both taxes, but he already filed his return, so not sure how to answer with her not having a 1098 to claim.