Other Questions

Let's perform some troubleshooting steps to fix the issue, Connie47.

When I entered a vendor credit with the same date you mentioned, I was able to successfully saved it. I may be using a US version of QuickBooks Online (QBO) account, however, please know they all work just like the same as with the International version. I've added a screenshot for your reference:

Since you're unable to enter a vendor credit with the December 2021 date, 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 creating a vendor credit and double-check if you're able to save the date. 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. 

Furthermore, QuickBooks offers a wide range variety of reports that tells you the different aspect of your business. You'll just have to customise them to make sure you get the information you need most. I've added this resource for your guide: Customise Reports In QuickBooks Online.

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!