To fix the QuickBooks Error 6123, you need to follow some steps. For example- you need to download & run the QBFD tool in your system. Then, you need to browse the company file. And choose the option to check file damaged only, then you should diagnose the file. Also, you have to enter correct admin password & then click on OK. now- choose the open the file in an updated version or repair file in the existing version. Get QuickBooks Error Support to get further information from the support executives. They will offer you all the required information from the core.
Toll- Free: 1-800-966-9904