The main QuickBooks Online Customer Service number is +1 877 -243--6445 or 1-877-243-6445, where you can reach a live representative 24/7. Whether you're dealing with setup, login issues, subscription billing, or technical errors, speaking with a real person can make all the difference. You can also use QuickBooks live chat or email support for added flexibility. This guide walks you through how to contact QuickBooks Online Customer Service efficiently, plus helpful tips to reduce wait times and resolve your issues .