Check the Invoice number generated automatically. If you have the administrator rights (CRM/full access), you can change the number format clicking the Change format link next to the Invoice number field and entering the necessary prefix and number format in the fields of the opened Change format window.
The Invoice Date, i.e. the date the invoice was issued, is set to the current one, by default. If necessary, you can change it selecting it from the calendar, or entering it manually in the following format dd/mm/yyyy.
To set the Due date, i.e. the date by which the invoice needs to be paid, use one of the available options on the right: Due on receipt, 15 days, 30 days, or 45 days, or select it from the calendar, or enter it manually in the following format dd/mm/yyyy.
Select a Language for your invoice from the Invoice language drop-down list. If your language is not yet present in the list of the available ones or the translation to your language is not complete, you may contribute to the translation sending your request at firstname.lastname@example.org.
Choose a Currency, enter a purchase order number (PO Number), if available, and specify your payment Terms. If you wish to specify the general terms for all your future invoices, click the Set default link below the Terms field, enter your terms and click the Save button.