How to fill out online form for a Taiwan res. Visa

Hello i was wondering on how to fill the online form to a resident visa to Taiwan. I was stuck in the journey to Taiwan bit of the form where it asked me to fill in the date of arrival and proposed date of departure. But since im applying for a multiple entry resident visa to go to university i am not sure how to fill in the proposed date of departure. Can someone please help?

That one doesn’t really matter but you should enter the expected date of graduation.