Contact866-265-2764 Quickbooks Desktop Support Phone Number | Yes, QuickBooks does offer 24-hour customer service support USA +1 (866) 265 2764 (No Wait). Whether it's the middle of the night or early in the morning, you can rest assured that help is just a phone call away. QuickBooks understands that accounting issues can arise at any time, and they want to make sure their customers have access to assistance when they need it most.