Are you trying to use the QuickBooks application, but are you getting the error message 'the attempt to login with the username failed'?
On this page, you will find more information about the most common causes and most relevant solutions for the QuickBooks error 'the attempt to login with the username failed'. Do you need help straight away? Visit our support page.
We've created a list of solutions which you can follow if you want to solve this QuickBooks problem yourself. Do you need more help? Visit our support page if you need professional support with QuickBooks right away.