Thanks Shike Riyaz for the information. Sure, I'll submit now.You will not see that updates in your application. Web form is just for their reference and they will keep those docs as well while doing assessment. They will not come to you again for clarification if you have submitted the web form with proper letter and it is with them while doing assessment. So, what ever you have submitted now will remain same . nothing can be updated. Only we can submit additional documents or clarification using web form before or after they come back to you. I would suggest you to submit now itself before they come back and ask you for the information