Can I request IRS for refund if I believe there was an error of my tax estimation?

[Mike9241]

not quite sure what you're asking about but if your think you've overpaid your 2021 taxes, there's no way to get it back until you file your 2021 return.

[Carl]

I assume you are referring to quarterly estimated taxes you paid. If you overpaid, that's not a bad thing. But you don't get the over payment refunded to you until you file your tax return for whatever tax year you may be referring to.