You can easily create and post a G/L account document using the Fiori App Post General Journal Entries. The entry screen of the Fiori App Post General Journal Entries is divided into multiple areas as shown in the figure Fiori App - Post General Journal Entries.

Header data:
Header data applies to the whole document, such as posting date and document type.
Line Item information:
Enter the line items of the document here.
Tax items:
Enter tax items details, for example if the system should calculate the taxes automatically during simulation or posting, here.
Select Templates:
Here, you can select templates as references.
To save time and effort when entering information for numerous journal entries, create journal entry templates that match your specific needs using the Manage Journal Entry Templates app.
When you create a journal entry template, you select those fields and values that you need for a specific use, such as for submitting and posting journal entries.
When you create a journal entry template, you can also choose to make it public, that is, share it with other users in your organization.