Because the payments were made over a period that covered two tax years, you have an Installment Sale. Part your gain will be reported on your 2018 tax return, and part of it on 2019 tax return.
To record an Installment sale in TurboTax Online:
- Click on "Search" and type "Installment Sales" in the window and hit Enter
- Click on "Jump to Installment Sales"
- On the page "Any Other Property Sales" check the box for: "Sales of real estate, cars, or anything else for which you receive payments over two or more tax years (installment sales)" and click Continue
- If you are using Deluxe you will be prompted to upgrade to Premier
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On the Installment Sales page answer yes to "Do you want to report an installment sale?"
- Continue through the interview and record the details of your Installment Sale
