Do not include the 3rd payment, only the first two payments are entered on your 2020 return. TurboTax will calculate the amount you qualify for in 2020. You will enter $0 in both payment boxes or answer NO ()depending on what platform you are using) since you did not receive either payment and then TurboTax will add the recovery rebate to Line 30 of your tax return. The new bill was just passed today, here is everything we know now about the 3rd payment. It is not included with the tax return you are filing now.
If you didn't receive the full amount for your first or second-round stimulus payments, we'll help you claim the Recovery Rebate Credit when you file your taxes this year. We'll make sure you get the money you qualify for by double-checking the amount and quantity of stimulus payments you received.