QuickBooks allows users to open the same company file in multi-user mode. When a user tries to open it in single-user mode, they come across a message, “QuickBooks already has a company file open.” This sometimes happens when QuickBooks is not running as the same Windows user. Check the linked blog for troubleshooting solutions to fix it or dial 1.855.738.2784 for direct consultation with the QuickBooks support team.
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