SAP Message 5G666 - Previous earnings and tax should not be entered for tax basis W1/M1

Diagnosis
Previous earnings or tax have been entered on infotype 'Tax Data GB'(0065) for an employee whose tax code originates from form P45, eventhough a Week1 or Month1 tax basis applies.

System Response
As the tax code originates from form P45, no starters details should berecorded. This is because the form itself should not hold previousearnings if a Week1 or Month1 basis applies for the tax code at leavingdate.

Procedure
Please check whether the tax code originates from a P45 form andwhether a Week1 or Month1 basis applies for the employee according tothe form. If both these situations are valid, no previous earnings ortax should be recorded.