Voluntary deduction (401(k) After-Tax) stopped processing unexpectedly or was not processed.

Summary:

A third-party system sends input to Oracle Payroll through Element Entries for payroll processing.

For two employees, the 401(k) After-Tax voluntary deduction was processed successfully for two payroll runs but then stopped unexpectedly before reaching the maximum contribution limit.

For another employee, the 401(k) After-Tax element entry was created successfully, but the payroll calculation did not process the deduction.

How will I determine the exact root cause of these issues and identify the appropriate troubleshooting steps?

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