Here are the steps for downloading QuickBooks Connection Diagnostic Tool 2018. Follow each step carefully one by one.
The very first step you need to take is to remove any previous version of the QuickBooks Connection Diagnostic Tool.
The next step is to visit the official website of Intuit and download QuickBooks Connection Diagnostic Tool.
Open the folder where you saved the setup after downloading. To view it, click on it.
The installation window will appear.
Accept the terms and conditions by clicking I agree. Click Next later.
Follow the on-screen instructions to complete the installation.
Choose the folder where you want to save the installation files. Typically, it is recommended to save it on the C drive.
If the tool does not start on its own after installation, then you will have to click the desktop icon to launch it.
Read here: https://quickbookstoolhub.com/quickbooks-connection-diagnostic-tool/