Do my cosigners owe cap gains tax when I sell?

[Jada P.]

I bought my first (and only) condo 4 years ago for ~$300k, and my parents cosigned the loan (and are on the title). Having lived in this condo for the last 4 years, I am sure that I wouldn't owe tax on the sale (now the condo is worth >$400k). But what about my parents? Or is it possible to remove them from the loan/title before selling (probably will sell in the next ~2 years)? I could imagine refinancing and replacing my parents with my husband, but then I think they would owe tax anyways since we would have to sell it at the current value, right? Please let me know if you have any suggestions or experience. Thanks!