Clarification on time line to file an amended return

[GraceNY]

I have a client who filed their 2021 personal income tax return on 10/13/2022. An extension was timely filed on the due date of 04/18/2022.  I'm looking for clarification on the date he can file an amended return and receive a refund.  

According to IRS instruction for 1040X: "Generally, for a credit or refund, you mist file Form 1040-X within 3 years (including extensions) or within 2 years after the date you paid the tax, whichever is later."  Does this mean that he has until 10/13/2025 to file an amended return?

Thanks.

[Lion EA]

He can file an amended return at any time. He can receive a refund if he files within 3 years, by 10/13/2025.