Miscalculation of Recovery Rebate Credit

I filed on TurboTax for the 5th year in a row on 2/9/2021.

 

Somehow, I got nothing on my return, and in addition, had to pay $1 to the IRS. My return was accepted and $1 withdrawn from my bank account. That isn't necessarily the issue though.

 

Yesterday, 3/22/2021 I received an official letter from the IRS stating they found a miscalculation on my 2020 Form 1040 affecting my "Recovery Rebate Credit", and as a result I now owe $600.00 that must be paid by 4/19/2021.

 

I have never in my life made enough to ever have to pay in. After sitting on their phone line for 1 hr 35 mins I explained the situation and the representative said since I did receive the $600 via direct deposit, and I also claimed it on my 2020 return (a mistake on my part, I thought I was supposed to), that I have to pay $600. 

 

She also said amending my return would do nothing. This makes no logical sense. If it was just my small mistake, and amending my return to not claim the Rebate Credit because I received it, how do I still owe $600??? If I did not make this mistake I would be good, but oops now you owe $600. I am livid.

 

I have a manager scheduled to call me back in 24-48 hours because I don't agree or understand.

 

Can anyone helo me understand this and what my options are? I am really scared.

 

Sincerely,

Matt