Why did QB enhanced incorrectly calculate payroll by including SS despite being over the cap,and not including Medicare Add Tax. Sporadic Error in Dec 2018

This is to ALERT everyone of an error that QB enhanced payroll made.  Support does not have an answer.   I have exceeded the Social Security Cap for many months and my payroll module was calculating things correctly, and added in the additional Medicare Additional Tax that I owed.   For some reason, the payroll generated in the first half of December 2018 included Social Security Payments, and did NOT include Medicare additional Tax.  The next payroll at the end of December was created correctly by QB Payroll.   The issue for me is that I pay the Feds directly on line via EFTPS, and I over paid SS because of this, and I underpaid Medicare.   I will now have to correct the reports.  Why did this happen?


I have seen this happen when someone issued bonus checks dated early in Dec; then ran payroll after this. Then, they Redated the Bonus paychecks to end of Dec, and had one more paycheck cycle in the year.

Run the Payroll Checkup Tool for this period, from the Employees Menu.

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