You have made entries in the document header.
To enter each vendor item, specify a posting key and account number and, if necessary, a special G/L indicator and a new company code on the screen prior to entering that item. On the next screen you enter all additional data for the line item.
For each item, you must enter:
Posting key
Vendor account number
Enter the following data if it is required:
Special G/L indicator
Terms of payment
Assignment for the line item display