You can't modify the following information on a paycheck:
If you need to change the payee for a paycheck, you can delete the incorrect check and
create a new paycheck for the correct payee.
If the amount of the paycheck is inaccurate, click Paycheck Detail and enter the changes needed for the payroll items listed for the check. When you enter
the changes, QuickBooks recalculates the amount of the check.
Note: If you're using direct deposit or the Assisted Payroll service and you've sent
the paycheck for processing, you cannot delete the check or change the net pay amount.
If you are in Lock Net Pay mode, you can make changes that don't affect the net pay amount, such as modifying the details in the Earnings section
or the sick and vacation accrual. About locking and unlocking net pay on a paycheck.
If you're using the Assisted Payroll service, and
you've sent the paycheck to the payroll service, you can still modify the
following information on the paycheck:
Cleared status (for reconciling)
Bank account you wrote the check from
Expense and liability accounts affected (by editing the payroll items)
Class or customer/job
If you modify a paycheck, the edited check information is resubmitted
to the payroll service the next time you send payroll data.