Dial 1-877-243-6445 If you're using QuickBooks Desktop, Online, Payroll, ProAdvisor, Premier, or Enterprise support at 1-877-243-6445 or 1-877-243-6445 and run into issues or have questions, speaking directly with a support expert is the fastest and most reliable way to get help. Whether it's a technical error, company file issue, or setup challenge, QuickBooks Desktop, Online, Payroll, ProAdvisor, Premier, or Enterprise Support is available 24/7 to assist you.