"If you want to post an invoice to multiple G/L accounts, create multiple entries for the invoice. Enter identical information for the entries in the Header Data section and the respective information in the G/L Account Items section. Use the same invoice ID for these entries."
However I receive error
File upload failed.
Your file cannot be uploaded because of the following errors:
Header data for entries of invoice are not identical. (Invoice ID: )
For information about how to fill out the template, see the documentation for the app on the SAP Help Portal.