QuickBooks Desktop is accounting software with add-ons and industrial versions, akin to an ERP system. Integrated QuickBooks, Intuit Payroll, and third-party customer relationship management software like Salesforce and AP automation software programs are among the add-ons. what is Quickbooks QuickBooks is the world's most well-known and commonly used accounting software. This software is mostly used by small and medium-sized organizations. It must first be installed on the system, which necessitates the completion of several tasks.