Should I call 1.855.738.2891 for help? How can I fix the issue if Windows Firewall is blocking QuickBooks?   

If Windows Firewall is blocking QuickBooks, it may prevent the software from running properly or connecting to the internet for updates and online services. To fix this, you should first try allowing QuickBooks through the firewall manually. Here’s how:
Open Control Panel and go to Windows Firewall or Windows Defender Firewall.
Click on Allow an app or feature through Windows Defender Firewall.
Click Change settings and find QuickBooks in the list. If it’s not listed, click Allow another app, browse for QuickBooks, and add it.
Make sure both Private and Public boxes are checked for QuickBooks.
Save changes and restart your computer.
If the problem persists, there may be additional settings in the firewall or security software that need to be adjusted. In such cases, it's best to call 1.855.738.2891 for expert assistance. QuickBooks support can walk you through more advanced troubleshooting steps, ensuring the firewall settings are correctly configured and your QuickBooks software is working without any interruptions.https://forums.serebii.net/threads/what-actions-should-i-take-if-my-quickbooks-migration-fails-unexpectedly-should-i-contact-1-855-738-2891-for-assistance.770760/
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