Depending on the reason causing the issue, there are a lot of solutions that can be picked. You can also check which of the solutions is the best one for your situation. Here are some of the common solutions that you might pick from. They are going to help you with fixing QuickBooks Not Updating.

• You should re-enter Quickbooks using your admin credentials.  

• Ensure that the time and date on your PC is correct. If not, please do it.

• Try configuring your internet connection settings.

• You can also try configuring the firewall security and internet settings.

you may also read: How do I update my QuickBooks desktop