Form cp21c notice.

[TheWalkman]

I e-filed my taxes in March, 2021 and sent a check for the amount due.  On May 12, I received a notice, Form cp21c,  saying my taxes had been reduced by the amount that had been due.

Will the IRS automatically issue a refund for the amount I paid or do I need to file an amended return?

[JotikaT2]

You do not need to do anything unless you disagree with the changes made by the IRS.  

Please see the link below for additional information.

IRS Notice CP21C information

[TheWalkman]

To clarify, that means the IRS will issue a refund check with no further action on my part?

[ColeenD3 · Accepted solution]

It means that they have adjusted your refund was reduced. If there is a refund to be had after the reduction, they will send it to you. Do not file an amended return. They have already "amended" your return for you.