QB Desktop Payroll Won't Allow Tax Payment to be Scheduled for 4/16/21

I am experiencing the exact same problem.

Good day, rd_sutton and CrushedStone. I'm here to help get your tax payment scheduled for 4/16/21 in QuickBooks Desktop.

To schedule your tax payment on 4/16/21 in QuickBooks Desktop, ensure to adjust your liability check withdraw on date appropriately or you can submit the payment 1 business day earlier.

However, if the dates are correct but still getting the same issue, I'd suggest getting in touch with our QuickBooks Desktop support to have investigated.

Please be reminded that our representatives are available from 6:00 AM until 6:00 PM on weekdays, and 6:00 AM till 3:00 PM on Saturdays. Here's how to get a call or chat from us:

1. Open QuickBooks.
2. Go to Help, then select QuickBooks Desktop Help.
3. Select Contact Us.
   
4. Give a brief description of your issue, then select the Start Messaging option.
   

Also, you might find this write-up interesting: Set up and pay scheduled or custom (unscheduled) liabilities. This will give you more insights about setting up scheduled payments as well as steps to create reminder notices.

If you need more help with QuickBooks, please let me know by adding a reply below. I'll zip right back to help you out.

https://www.irs.gov/pub/irs-pdf/p15.pdf - Page 29 - April 16—District of Columbia Emancipation Day