Yes, if you don't already have a copy of your 2020 return handy, sign in to your TurboTax account and select the download/print option to get a copy. Look at line 30 on your form 1040 there should be a Recovery Rebate Credit amount there.
If not, you will need to amend to claim the missing payments. Per the IRS guidance here in question G1.
Sign back in to your account and use the "Amend" option. Click the "Federal Review" tab or use the "Search" option and type in "Stimulus". Use the "Jump to..." link at the top of the results to get to the stimulus questions.
Here is a link for more assistance with amending if needed.
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