How do I put a check number in on a payroll check that has already printed? Only one check recoreded the rset did not.

We're glad to have you here in the Community, Platinum1011.

I'm here to help you update paycheck numbers in QuickBooks Online Payroll.

You can edit your paycheck number anytime if you've entered an incorrect one in just a few steps. Here's how:

1. Head to Payroll, then Employees.
2. Click on the Paycheck list below the Run payroll dropdown.
3. Utilize the Filter dropdown to locate the specific paycheck.
4. Key in the correct Check number in the provided column.
5. Hit Save & Close.

After that, you can reprint the paycheck with the accurate check numbers. To do this, tick the checkbox for every check and then pick Print.

Moreover, consider scanning this material for guidance on generating data to gather valuable knowledge from your business and employees: Run payroll reports.

Keep us posted in this forum if you have additional questions when updating paycheck numbers or other related concerns in QuickBooks Online Payroll. We'll be around to help.