If we sold a home in 2017 the adjusted cost basis appears to have already been calculated, but can we check to ensure 100k in improvements are included? It looks missing

we sold a house in 2017 - the adj cost basis was input automatically by turbotax, but looks extremely close to our orig purchase price in 2006, but not reflecting our $100K in improvements.  I went to the form view - and the ACB worksheet quickzoom button does not work, so I can't see how that number was calculated.  This makes a substantial differential in capital gains assessment if calculated incorrectly and we can't fix it.  Help!