I want to create a button on header in suitecommerce advance website along with login, register and I want to show form on click on that button, so how can I do this, so can I need to code in theme or in extension ? What is the best approach ?

An extension that adds a child view to the Header.Profile view probably

and where can i find the Header.Profile view file?

You don’t need to find it, you just need to use it as a target when you use the extensibility layer

okay thanks👍