When you enter the sale of the home, after you enter the selling price, basis, and dates, TurboTax will ask a series of questions to determine whether you qualify for the exclusion of gain. One of the questions asks whether you had a spouse who passed away within the two years preceding the sale. If you answer Yes, it asks a couple of follow-up questions. If your answers indicate that you qualify, it will give you the $500,000 exclusion.
In a previous question you indicated that this is not working for you. If you have checked your answers and you are still not getting the $500,000 exclusion, contact a TurboTax Live tax expert for help. Go to the following link for instructions.
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