Thanks for reaching out, @pawsit.
QuickBooks will automatically detect the missing withholding on the last payroll run and add it on to the next check. I recommend checking your payroll updates before running payroll to make sure you have the latest tax tables. It's super easy and only takes a moment. Check it out:
That's it! If you have any other questions, let me know by hitting the Reply button below. I'm here to help.