I can share some troubleshooting steps that can help fix this issue.
It could be that the accumulated cache in the browser is preventing you from successfully saving the changes on the check. To rule this, you'll want to access your account using an incognito/private window. This mode doesn't use the existing site data. Here's are the shortcut keys:
Ctrl + Shift + N for Google Chrome
Ctrl + Shift + P for Firefox & Microsoft Edge
Command + Shift + N for Safari
Once you're in, open the and edit the category of the check again. If it's now working well, close the incognito window and then go back to your regular browser. Next, clear its cache to delete the stored temporary internet files and start over fresh. Alternatively, you may also use other supported browsers.
In addition, I've added some resources that you can read to help manage your checks in QuickBooks Online:
Hope you’re doing great. I wanted to see how everything is going about the issue you've encountered. We're you able to change the category of the check? Do you need any additional help or clarification? If you do, just let me know. I’d be happy to help you at anytime.
Looking forward to your reply. Have a pleasant day ahead!
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