When there is a problem with communication between QuickBooks and an integrated program, the message QuickBooks Error 80040408 displays. The QuickBooks file is usually in the wrong mode when this happens. Make sure QuickBooks is operating properly and that your third-party application's integrated settings are correctly configured in order to resolve the issue. If you wish to speak with a QuickBooks support agent immediately, contact us at +1.833.802.0002.