At the time I filed my tax return I didn’t receive second stimulus payment so I claimed recovery rebate refund. I submitted it and week later I received my second stimulus payment.

[bstanislava]

What should I do now?

[JohnW152]

It depends.  

If your e-filed return is rejected, you'll be able to make any changes related to the Recovery Rebate Credit.

If your e-filed return is accepted, you can't make changes to your original return.

But... when you receive the refund for your original return, you'll be able to figure out whether the amount of the Recovery Rebate Credit that you actually received as part of your refund was based on what you entered on your return, or not. 

It's possible that the IRS will already have made the correction during processing, and adjusted your refund accordingly.  If that's the case, the IRS will send you a notice telling you they've made the correction, and you won't need to amend your original return. 

If you do need to amend, please see the TurboTax Help article How to amend (change or correct) a return you already filed for instruction on how to amend your previously-filed tax return.

The IRS requires you to report all relevant stimulus information when you’re filing your return.

[James1197]

So If I’m reading correctly The irs will Fix the Mistake?

[DianeW777]

Usually in a circumstance like this, the IRS would reconcile their payments with tax returns before releasing the refund.  You should wait until your return is fully processed.  If you should receive the second stimulus as part of your refund then an amendment should be completed and the money repaid.

Review Get My Payment - Select the button Get My Payment to see if your information is current based on the payments you did receive. If so, then it's another confirmation the IRS should not release the funds a second time.

If necessary use the information provided by @JohnW152:

f you do need to amend, please see the TurboTax Help article How to amend (change or correct) a return you already filed for instruction on how to amend your previously-filed tax return.

The IRS requires you to report all relevant stimulus information when you’re filing your return.