sale of primary residence

My wife and I sold our primary residence (a condo) in October of 2023. We sold the condo for about $100,000 more than it was purchased for. My wife lived in the condo for 8 years before it's sale. According to Turbo Tax we owed capital gains tax on this. After doing some research this seems like it should have been exempt. What recourse do I have at this point?