To fix the QuickBooks Unable to Communicate with the Company File Error, start by verifying your network setup. Ensure the QuickBooks Database Server Manager is running on the host computer. Check firewall and antivirus settings to make sure QuickBooks files are not being blocked. Use the QuickBooks File Doctor tool to diagnose and repair file-related issues. Verify that hosting is turned on only for the server. Ensure all computers are on the same network. Update QuickBooks to the latest version and reboot all systems. If the problem persists, consider seeking professional technical support. Please visit our website: https://www.adviceventure....