Which three are mandatory transaction source information?

Given the business use case:
'New Trucks' runs a fleetof trucks in a rental business In the U.S. The majority of the trucks are owned; however, in some cases, 'New Truck' may procure other trucks by renting them from third parties to their customers. When trucks are leased, the internal source code is 'L'. When trucks are owned, the internal source code is 'O'. This identifies different accounts used for the Journal entry. Customers sign a contract to initiate the truck rental for a specified duration period. The insurance fee is included in the contract andrecognized over the rental period. For maintenance of the trucks, the "New Trucks* company has a subsidiary company
'Fix Trucks' that maintains its own profit and loss entity. To track all revenue, discounts, and maintenance expenses, 'New Trucks' needs tobe able to view: total maintenance fee, total outstanding receivables, rental payment discounts, and total accrued and recognized insurance fee income.
What would the typical line information be?

While creating a journal entry rule set you are NOT able to use an account rule that was createdrecently.
Which two reasons can explain this?

What are all the tabs that areavailable to be completed in the Register Source System spreadsheet?

Invoices received from a source system need touse a specific account based on 30 different expense types.
However, if the invoice is from a certain supplier type, it needs to go to a default account regardless of the expense type.
What is the solution?