Are you using the Deluxe version of turbo tax? I am testing my response using last year's desktop version so I don't know how different it is now. You need to delete all your entry relating to the sale of a second home. You sold an investment asset. Go to Wages and Income, scroll down to Investment Income (1099-B or broker statements). Then click Update on the Stocks, Cryptocurrency, Mutual Funds, Bonds, Other line. And the select Other (1099-s). It should be straight forward from there.
