This happens if you process paychecks using a scheduled payroll where the date is advance to the next pay period.
Let's edit your payroll schedule by updating the dates of the pay period and paycheck date. This will help remove the alert in the system.
Go to the Employees menu, then select Payroll Center.
Go to the Payroll tab.
Highlight the scheduled payroll.
Click the Payroll Schedule drop-down list, then select Edit Schedule.
Enter the pay period end date and the date should appear on paychecks for this pay period.
Otherwise, your tax table isn't updated and that's why taxes are showing as not paid. To prevent this from happening, it's recommended to update your tax table every time you pay your employees. Doing this will also get the most current and accurate rates and calculations in the system.
Let me show you how:
Go back to the Employees menu, then select Get Payroll Updates.
Choose the Download Entire Update option, then click Update.
A window will appear when the download is complete.