Why is TurboTax requiring me to upgrade to Premier when I don't owe tax on sale of home?

Profit on sale was $76,000. Result stated no tax was on owed on the sale. Next page says, "Because you owe taxes on the sale of your home, you need to upgrade to TurboTax Premier to continue" I don't owe tax on the sale. Why won't it let me continue until I upgrade to Premier??