We can take some troubleshooting measures to get the drop-down menus working in QuickBooks Online (QBO), misbahmasood1992. This could be an issue related to your browser.
May we know the exact error message you've encountered while saving the invoice transaction? Any screenshots you can provide will help us isolate the issue better.
To resolve strange issues in QBO, we can access your account using an incognito/private browser. It could be your browser's cache and cookies are corrupted causing unexpected behaviors while saving a transaction. Refer to these shortcut keys:
If it works, go back to your regular browser and clear the cache to delete those temporarily stored files and browsing history. The overtime data collection can create corruption, however, removing this should fix the issue. You can also use supported, up-to-date browsers to roll out the possibility of a browser-related issue.
Moreover, you can check out these articles to help you in handling your invoices in the future:
We've got your back if you have more questions about managing your invoices or any sales forms-related concerns. We're always available to help you out.
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