To contact QuickBooks Enterprise customer service, you can call their toll-free support number at 1-888-960-5414. Alternatively, you can access support through the QuickBooks website or use the in-product help feature for guidance and troubleshooting. Representatives are available during business hours. How do I contact QuickBooks Enterprise support? You can reach QuickBooks Enterprise support by dialing 1-888-960-5414. This number connects you directly with a representative who can assist with Enterprise issues, software troubleshooting, or other concerns. Support is available during their business hours, Monday to Friday from 6 AM to 6 PM PT.