QuickBooks Error 6000 83 is a banking error in the QuickBooks application. It appears when you try to download update or backup company file. The error restricts you from performing operations and thus needs to be resolved soon. To resolve the error, you need to answer the security question you had set earlier or enter the OTP received through text or call. If you need an expert's help for resolution, then contact us at 1.800.579.0391.