Do I need to amend my 2020 Taxes

I filed with TurboTax and it was accepted by IRS on February 13, 2021.  After that WMR does not show that they have any information regarding my return.  I am disabled and only filed for the recovery rebate credit.  The amount of refund was $4,000. I entered the wrong amount in filing my taxes. I did receive the first stimulus so I need correct the amount that was filed. Do I amend my taxes or wait for the IRS to send something?