Correcting Medicare

Forum|Forum|30 days ago
July 24, 2026
5 replies
81 views

Hi!
The “Subject to Medicare” button got incorrectly checked, and an employee’s paystub got processed with no MC withheld.

After turning “Subject to Medicare” back on, I manually calculated the missing amount and added the missing MC tax to be withheld from the employee’s next payroll.

Now I’m processing quarterly reports and found out Quickbooks self-adjusted and removed my correction. How do I prevent this going forward?

I’m on Quickbooks Payroll Desktop.

Best answer by Janiqueca_T

QuickBooks recalculates FICA based on year-to-date wages when settings are toggled, which can remove duplicate withholdings while leaving quarterly reports misaligned. To fix this, enter a payroll liability adjustment rather than editing paychecks directly.

Here is exactly what to enter:

Go to Employees, and click Payroll Taxes and Liabilities.
Open Adjust Payroll Liabilities.
In the Date & Effective Date, set both to the last day of the quarter the Medicare was missed (e.g., if it happened in Q1, use 03/31).
Select Employee in the Adjustment is for and choose the affected employee's name.
Under Item Name, select Medicare Employee.
Enter the Medicare amount that should have been withheld as a positive number.
In the Income Subject to Tax column (optional), enter the previously excluded wages to update the wage base and prevent them from being treated as untaxed.
Click Accounts Affected and choose Do not affect accounts (this updates only the payroll records and YTD reports, avoiding double-posting since the paycheck and bank register are already correct).
Add a Memo (e.g., “Medicare correction for [pay date] — Subject to MC was incorrectly unchecked”).
Click OK.

Never edit taxes directly on paychecks, as QuickBooks will override them. Use Adjust Payroll Liabilities for prior periods, and ask us for help amending Form 941 if the quarter has already been filed.

To check, run a Payroll Summary report. For step-by-step instructions, check this article: Create a payroll summary report.

Should you have any questions or need clarification, please let us know below. We’re here to help.

S

ShangY

QuickBooks Team

When you checked Subject to Medicare back on, QuickBooks Desktop automatically calculated the catch-up tax for the next payroll. Because you added it manually, the system saw the extra entry as a duplicate and wiped out your manual edit to keep the Year-To-Date (YTD) math balanced.

To handle it going forward, let the software auto-calculate the missing amount on the next paycheck. Avoid manual edits on the stub, as QuickBooks's tax engine will usually recalculate and overwrite them.

Then, use Liability Adjustments for past quarters. This locks the fix in without QB overriding it.

Go to Employees > Payroll Taxes.
Select Liabilities > Adjust Payroll Liabilities.
Set the date to the end of the affected quarter, and enter the adjustment there.

After that, run a quick Payroll Summary report for that employee. Compare their YTD Medicare tax withheld to their YTD wages to see if QB's automatic adjustment already brought their balance up to date.

That's it. Let me know if you have further questions or concerns.

T

Tabor PayrollAuthor

New Member

Can you explain more on what to enter for the Liability adjustment? Quickbooks isn’t super transparent about how the changes will affect the employee.

I did a little experiment: If I don’t make changes, Quickbooks’ automatic adjustment removes a paystub’s worth of Medicare. The paystub that occurs AFTER that withholds normally, but the YTD Medicare withheld will still be incorrect.

I’m concerned that Quickbooks still sees the Wages recorded during the time ‘Subject to Medicare’ was OFF as ‘still not subject to Medicare’, even though I’ve turned the ‘subject to MC’ button back on.

J

Janiqueca_T

Answer