Effective Way out To Troubleshoot QuickBooks Error 12002

by Natasha Dean Certified Accounting ProAdvisor

QuickBooks Error Code 12002 is a technical error that appears abruptly and puts a complete dead stop on the accounting operations performed in QuickBooks. This error is typically caused due to a slow internet connection or a network timeout. There are different strategies that can be adopted to fix QuickBooks Error 12002.

Major Causes Behind QuickBooks Error 12002

The firewall or security software may be causing the error.
Erroneous SSL settings.
Insufficient storage in the system.
Internet Explorer not set as the default browser.
Poor internet connectivity.
Wrongly set internet settings can also provoke Error 12002 in QuickBooks.

Procedure to Fix QuickBooks Error 12002

Solution 1: Make Sure Internet Explorer is the Default Browser

Press the Windows and R keys to reveal the Run box.

Type INETCPL.CPL and tap on Ok.
Head to Programs.
Herein, make Internet Explorer as the default browser.
Run QuickBooks and perform the action that previously led to QuickBooks error 12002. This solution should fix the error, if it doesn’t, move on to the next solution.

Solution 2: Configuring Internet Settings

Open the Run window.

Type INETCPL.CPL in it.
Hit the Enter key.
Set the protection level to Medium-high.
Click on the Internet option.
Now, go to the Security tab.
In the Security tab, head to Connections.
Hit on LAN settings.
In the Connections box, checkmark the box corresponding to automatically detect settings.
Unmark "Use a proxy server from your LAN".
If it is marked, then type in the correct I.P. and Port.
After that, hit on Ok.
Now, go to the Advanced tab, followed by the security section.
Click on Use TLS 1.2.
Hit on the Ok button.
Check if QuickBooks error 12002 got resolved.

Solution 3: Update QuickBooks

Update QuickBooks Desktop

Quit all the active windows of QuickBooks.
Open QuickBooks and keep holding the Ctrl key until the No Company Open window shows up.
When QuickBooks opens, go to the Help menu.
Click on Update QuickBooks Desktop.
Hit on Update Now.
Click on Get Updates and then choose the Reset Updates option.
Click on Ok and wait for the updates to finish downloading.
After that, hit on Close.
Now, install the downloaded updates by re-opening QuickBooks.
Hit on "Yes" on the onscreen prompt.

Solution 4: Make an Exception for QuickBooks in the Firewall

Hit on the Start menu.
Search for “firewall” and open the Windows Firewall.
Go to "Advanced Settings" and right-click "Inbound Rules".
Tap on the New Rule tab.
Click on the Port and choose the TCP.
Hit on Next.
Opt for the right port for your version of QuickBooks.
The port numbers for QuickBooks 2019 are 8019, 56728, 55378-55382, 56276, 55368-55372, and 55378-55382.
Upon entering the port, click on Allow Connection.
Then, hit on Next.
Pick each profile in the pop-up box.
Now, give the new rule a name and then click on Next.
Hit on Finish.
Perform the same set of instructions for the Outbound rules.
This should fix QuickBooks Error 12002.

Solution 5: Clean Install QuickBooks Desktop

Open the Control Panel.
Go to Programs and Features.
Opt for QuickBooks and follow up by hitting on Uninstall.
When the program is removed from the system, visit the QuickBooks directory and rename the QuickBooks folder.
Later, reinstall QuickBooks and use the license and product keys for activating and registering the product.
Check if QuickBooks Error 12002 got obliterated.

The current blog discussed the various solutions to troubleshoot QuickBooks Error 12002. If you are experiencing any deadlocks while using QuickBooks, just contact our support team experts at the helpline at +1-800-615-2347.