QuickBooks Tool Hub offers a wide range of tools to help you address problems related to your QuickBooks desktop application. It provides a one-stop solution for all accounting-related issues. You can download the QuickBooks tool hub from the Intuit website. In order to use the tool hub, you must have QuickBooks installed on your computer. The tool hub has a number of tabs that include a specific set of instructions that you can follow to troubleshoot an error. You can fix common errors like H202, 6123, file errors, etc.