QuickBooks Direct Deposit is not working can be due to various reasons such as incorrect bank information, outdated software, or insufficient funds in the account. It may also result from pending updates or verification issues with the bank. Users should ensure all details are correct, software is up-to-date, and sufficient funds are available. Troubleshooting steps include verifying bank information, updating QuickBooks, and contacting customer support for further assistance. Addressing these issues promptly ensures smooth payroll processing. For persistent issues, consult QuickBooks support or a certified professional for assistance at 1.855.409.2300.