For the Economic Impact Payments (stimulus) that were issued during 2020, you have until May 17, 2024 to file a tax return for the Recovery Rebate Credit, provided you were not being claimed as a dependent on a 2020 tax return.
You need to check your IRS account to see if the IRS sent the payments to you in 2020. Go to this IRS website for the IRS online account - https://www.irs.gov/payments/your-online-account
If you filed a 2020 tax return you will need to amend the return that was filed for the Recovery Rebate Credit.
See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
If you did not file a 2020 tax return and are eligible for the credit, then use this procedure -
To complete and file a 2020 tax return using TurboTax you would need to purchase, download and install on a personal computer one of the 2020 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
A 2020 tax return can only be printed and mailed, it cannot be e-filed using TurboTax.
