So I heard that if you are sure that there is nothing to change on your application, it is always better to submit them earlier. Does that mean that I can submit my REA application even in September or October?
You sure can, if you like. You won’t get your decision any sooner, but I believe they review applications as they receive them, so theoretically it would be seen quicker (not that the decision would be more or less favorable). If you’re meant to be admitted, you will be. If you’re not, you won’t. Don’t try and game the system with the round of admissions you choose or how early you choose to submit your application. When you’re ready to apply, hit submit and the cards will fall where they may.
You still need to wait for your recommenders and a complete file, right? So teachers may not be as keen to hurry as you?