Invoices

Can there be a way to edit the invoice so each company uses a different kind of invoice format to print.

Yes, I made something similar with this guide https://akaunting.com/docs/developer-manual/overriding-output

With a custom module you con override the output and also what data you store in database.

Let me know if you have any other issue.

Where to write this code ? wich file ? 

View::composer(

    ['incomes.customers.create'], 'Modules\FooBar\Http\ViewComposers\Customers'

);