Submission is about 8-9 day, so I’m afraid my helloween track and pack will not be upload in a certain day.
So I should upload my items (21 october) and in upload page send the message to the Reviewer – please upload my item 31 october.
Is it right guys or is there some other way?
Unfortunately, based on our experience, all you can do is estimate how long it will take the review staff to upload your product and time your submission accordingly. You can try to add a note to the file, but I doubt they will even see this until the file lands on their desk for review.