For those who service businesses that prefer less lines and long descriptions, we released Basic Blank Service Billing Format (No-tax, Long Description) and Basic Blank Service Invoicing Format (One-tax, Long Description). If you are looking invoice template in OpenOffice.org format, the easy way is to search on their Apache OpenOffice Templates. The template can accommodate plenty of entries, but all of the entries has to be done manually, which sometimes can be very inconvenient especially if you send many invoices daily. If you need more automation with your invoicing and bookkeeping, you can try our Invoice Manager Pro, free for 30 days, which can help you to do all this and even more. You can begin using this template in no time at all. Start by copying the information from your existing invoices into the table. If you want to try changing the display format, please press ctrl+1 and change the number format there. What format of data entry is considered as date, depends on the country/region of Excel. By default the template allows manual entry of due dates. If, in your small business, there is a standard term used such as Net 30 or Net 45, then we can automate this calculation. I have done the data entry but cant see any formulas working on the green section.