Here's “What Is QuickBooks”. QuickBooks is the most widely used accounting tool for small businesses for keeping track of income, expenses, and a business's financial health. Reports, bill payments, tax filing, and client invoices can all be done using it. Numerous options in the QuickBooks product range are great for everyone, from small businesses to independent contractors. Although there are several QuickBooks options, we recommend QuickBooks Online for the majority of new businesses. Without a credit card, one can obtain a free 30-day trial of QuickBooks Online.