Here's What Is QuickBooks. The most popular small business accounting program for monitoring revenue, expenses, and a company's financial health is called QuickBooks. It can be used to make reports, pay bills, file taxes, and send client invoices. Everyone, from a freelancer to a midsized business, will find many solutions in the QuickBooks product line to be outstanding. Although QuickBooks has a number of choices, we advise QuickBooks Online for the majority of new businesses. A 30-day trial of QuickBooks Online is accessible without requiring a credit card.