When an allowance appears wrong, identify the source of the error before editing the employee record.
The cause may be:
Incorrect employee class
Age
Family size
Effective date
Eligibility status
Plan configuration
Correct the underlying information and document the effective date of the correction.
Then review any records affected by the original amount, including:
Enrollment
Affordability
Payroll
Coverage
Employer reporting
Changing only the visible allowance amount can leave related records incorrect.