You can put a date when your permit is expiring. If its already expired you can same date you're applying on.Thanks, will do.
And another question:
I was watching some videos on how to fill in the forms for the offer of employment application because my HR manager wants to go through it together (they've never done this). There's one field that says "expected start date of employment". I am already working for the company, have been working for over 2 years. What are they suppose to put here?