Thanks for joining this thread, @waqarysheikh, and providing additional information about your VAT concern. 

You can start by updating QuickBooks Desktop to keep the software up-to-date and have the latest features and fixes.

Here's how:

1. Close your company files and QuickBooks.
2. Open the Windows Start menu.
3. Search for QuickBooks Desktop.
4. Right-click the icon and select Run as administrator.
5. While on the No Company Open screen, go to the Help menu and select Update QuickBooks Desktop.
6. Go to the Options tab. Select Mark All and then select Save.
7. Go to the Update Now tab and select the Reset Update checkbox.
8. When you're ready, select Get Updates.

I've added these articles for other troubleshooting steps if you're getting the same results:

• Fix common problems and errors with the QuickBooks Desktop Tool Hub
• While working in QuickBooks, QuickBooks closes unexpectedly (crashes with or without an error).

For more information about managing your VAT returns, here's a great article you can refer to: Submit A VAT return in QuickBooks. 

Please let me know how this goes by replying to this thread, or don't hesitate to post again. We're always here in the Community to help.