Amend return

[WLL1]

Question: should I file an amended return for 2021?

Background: Filed return using Turbo Tax in Feb. Return indicated ~2K$ overpayment. Filed return had an inadvertent error.  I placed the same tax payment as both my 2Q21 payment, and as the tax paid portion of an RMD. I just misunderstood the TT software. In March I got an IRS letter identifying the mistake, and requesting and additional $600 to fix the double counting of the same payment. I agreed and paid the $600, all before the April filing deadline. So the money is right, but my actual filed return is wrong. So, do I need to file an amended return, or is the IRS letter identifying my error enough?

[rjs]

You do not have to file an amended return, or do anything else. You are finished. Agreeing with the IRS letter and making the payment took care of everything. The IRS has already corrected the tax return that you filed.