You do not need to decline your ITA. In your post ITA application, the info will be locked. When you upload the documents, you can attach a LoE and explain this issue.Hello,
It may sound a bit stupid but I submitted my express entry profile and got my ITA. I got all my documents sorted and then realize that while verifying my profile I put the incorrect given name (missed to enter my middle name). I did not realize it before. Ex: In my passport Given Name: "John Smith" but in my application, I entered Given Name as "John".
Please suggest what should I do? Should I decline the ITA and re-apply?