he main SAP tcodes for Service Entry in the MM (Materials Management) module are:
Service Entry Sheet (SES):
ML81N – Create, Change, or Display Service Entry Sheet
This is used when you receive external services (like consulting or maintenance) and want to confirm them before posting for payment.
You typically use ML81N to:
Enter services performed based on a Service PO (Purchase Order)
Confirm quantities and values
Approve the entry for further invoicing
