Which voucher did you use when you sent the payment? Did you use the one that said 1040V ?
If you used one that said 1040ES that would have been for paying estimated tax for 2021. Have you seen money taken out of your checking account or credit card account? That is your only proof that you paid tax due.
Check your account on the IRS site:
https://www.irs.gov/payments/view-your-tax-account
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
