Thank you @JillS56
I choose itemize this year. In my case, state income tax doesn't contribute any deduction, why the refund is taxable in next year?
another option is that I can choose to deduct general sales tax instead of state income tax, right? but I don't want to spend the time to calculate general sales tax I paid in 2021. can I just estimate a very small amount, say $200? Because whatever the number is, it doesn't help any deduction.
