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Introduction of  QuickBooks Error: The Attempt to Log In With The Username Failed To use all the features of QuickBooks, a comprehensive accounting software in an effective manner or open any QuickBooks file, it is required to create an account on your QuickBooks software and log into it. But, when you are trying to attempt to log into a company file, you will see the following error message : “The attempt to log in with the username xxx failed”, “This user is already logged into the company file” Or “If possible, try logging in a using a different username”. Related article:  QuickBooks Error 3140: Reasons & solution Possible Reason for QuickBooks error “The attempt to log in with the username (Admin) failed”. There are can be several possible causes of the error. Some of are : QuickBooks user is trying to log into company data file by using the Remote Access, and the previous session is not logged out. The session is already logged in with the same credential int