Is it too early to file an amended return for tax year 2021?

[milkman]

Is it too early to file an amended return for tax year 2021?

[Just-Lisa-Now-]

as long as the original has completed processing, go for it.

[BobKamman]

Refund or balance due?  (Would you believe, not all amended returns are claiming an overpayment?)

And if it's for a client who forgot something, wait a couple weeks to make sure nothing else was forgotten.