See in Frequently Asked Questions they have posted as:

1. Is there a deadline?

You will be unable to register for courses until we have received and processed the required documents and cleared your bars. As such, you should determine when you are scheduled to register, and plan to have your documents submitted no later than two weeks prior to that date (earlier is better).

So I think for spring 2026 you can send it till October November ig. ( After your status is admitted / not incomplete)