Any missed stimulus payments from rounds one and/or two will be added to your 2020 tax return as a Recovery Rebate Credit. You can check line 30 of your form 1040 to see the credit amount added.
If you haven't already, you can print/download your accepted return from TurboTax. When you sign in to your account you will see "Print/download" option. Here is a link with more information.
You should see a credit of $1800 on line 30.
Additionally, once your 2020 return is processed you will be eligible for the third round of stimulus payments which will be sent in the manner you specified for your tax refund on your return.
Here is a link with more information on the Recovery Rebate Credit.