In the GL report different vendors are comin under 1 vendor namebut if you open that vendor separately in expenses then only that vendor's transactions are shown there

Let's perform some troubleshooting steps to fix the issue, mashhood.

When I run the General Ledger report, I only see one vendor under a vendor name.  Since you're seeing vendors, you can log into your account using a private window (incognito). Sometimes, your browser is full of frequently accessed page resources that may be the cause of unusual responses. To do so, follow the shortcut keys below: 

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

Once logged in, you can try running the report and check if there's another vendor. If so, return to your default browser and clear the cache to speed up the loading process.

Every so often, the cache becomes overwhelmed with older data which can potentially cause viewing and performance issues. Clearing it will refresh the system, and you'll be able to work with a clean slate. However, if the issue persists, try using other supported browsers.

I'll also share this article that lists other custom reports you can create in QBO: Common custom reports in QuickBooks Online. It includes a short description of each custom report, along with the steps on how to generate them. 

Let me know if you have any questions about creating vendor credit. The Community is always open for you 24/7. Have a nice day!