Answer
Lightning Payroll will not submit Employee Details unless at least one tax code is present for the employee. This is a mandatory part of the Employment Details payload sent to Inland Revenue.
What to check
- Open the employee's tax settings and confirm a valid tax code has been selected.
- Make sure the employee's tax setup has actually been saved before you return to the Employee Details Dashboard.
- If the employee's circumstances changed, confirm you are using the correct current code rather than leaving the tax section blank.
Why Lightning Payroll blocks the submission
Without a tax code, the Employee Details payload is incomplete and IRD-facing updates cannot be built correctly. Once the tax code is recorded, return to the dashboard and submit the task again.