Quickbooks Error 6123 is a very common error that can occur when using Quickbooks. This error may be related to the email notification settings on your computer that are configured to accept emails from yourself. When this setting is enabled, Quickbooks will send you a notification when you pay a bill. However, if you change your settings and no longer want notifications sent by Quickbooks, the error will stop occurring.
Quickbooks Error 6123 occurs when Quickbooks is trying to collect sales tax on an invoice by using the Tax Collect Code. This error message will often appear when this code was not used in invoices or if Quickbooks is unable to convert a Credit Memo into an Invoice.
Steps To Fix Quickbooks Error 6123?
1- Renaming the company file or removing any special characters from the name
2- Use QuickBooks tool hub program to fix this error
3- Use QuickBooks file doctor tool
4- Running Quick Fix my program from tool hub program
5- Creating a new Window User