Does QuickBooks Have 24 Hour Service? QuickBooks does not generally provide 24-hour service. For assistance, you can contact QuickBooks support during their business hours at #1-833-603-0120 or +1-855-200-1405. Does QuickBooks Have 24 Hour Support? QuickBooks typically does not offer 24-hour support. You can reach QuickBooks support during regular business hours by calling #1-833-603-0120 or +1-855-200-1405. Does QuickBooks payroll have 24 hour support? QuickBooks Payroll does not usually offer 24-hour support. For payroll-related assistance, contact QuickBooks support during business hours at #1-833-603-0120 or +1-855-200-1405.