Once you are done with application that is Filled, Submitted, and in case if you find error in filling forms then you will be having any other choice. Your ETA processing is already in progress. And if you incorrectly entered Passport Number, then you must inform Visa officer quickly. Your ETA will have to be routed once more, and you will bring upon yourself an additional charge for the new ETA.

If you have any further enquires then you can visit official website of Bureau.