Hi FetzAcc
Welcome to the Community Forum, I hope you find it a wealth of knowledge.
When customising forms, the 'Fields' option provides varies of Data fields which typically relates to the fields that you can enter data for, and may be different from transaction to transaction. Different forms will have different fields available as different transactions have different input fields, e.g. the 'Salesperson' data field is relevant for invoice forms but not for statement forms.
If you want to add a fixed information to the form such as your business ABN, please use the 'Text Box' option instead and drag it to the desired location. This Help page Personalising forms contain more details should you be interested.
As of the date format problem, we are currently aware that when printing receipts from an online file, the date format on line items is in US format (MM-DD-YYYY) rather than the expected Australian or NZ format. This is something our developers are investigating, in the meantime, you can work around it by backing up the online file and restore it locally. Once restored and opened locally any receipts printed will use the correct date format.
I hope this helps. If you have any other questions please feel free to let us know.