Quickbooks is the most widely used software for small business accounting. Quickbooks makes it easy to run your business from home, so you don't need to waste time and money on expensive office space in order to work. Quickbooks is a simple invoicing and accounting software with optional customizations for each type of business. Quickbooks includes a mobile app that lets you perform tasks from any location, no matter where your employees are. But sometime while working on it, there many types of error occur such as Quickbooks won't open. This is a coomon issue that you can rectify by follow just few steps.