How to display a tip message during invoice creation conditionally based on the invoice amount

Summary:

We have a requirement to display tip/warning message when the user creates the non-PO invoice manually and exceeds the invoice amount to 2K USD. Is it possible to achieve this requirement using IF-ELSE statements based on Invoice amount and display the tip/warning message accordingly.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

25C

Code Snippet (add any code snippets that support your topic, if applicable):