Bill Book also known as invoice book. Bill Book is crucial for small businesses, because invoices are the business documents that enable companies to get paid for their services. It is helpful for recording all the sales transactions a business makes with its clients.

Invoices are used by businesses for a variety of purposes, including:

• To request timely payment from clients

• To keep track of sales, for businesses selling products

• To forecast future sales using historical data

• To record business revenue for tax filings