QuickBooks Error 6143 can be frustrating when trying to open a company file. This error typically indicates issues with file corruption, network configuration, or third-party software conflicts. To resolve QuickBooks Error 6143 it, start by verifying and rebuilding the company file within QuickBooks. Ensure your QuickBooks software is up to date, as updates often address such issues. Check network settings for correctness and potential firewall conflicts.If the above steps do not resolve the issue, it is recommended to seek assistance from QuickBooks helpline Number.“You Can Call Us +1(855)-955-1942”