Q13, the last box (If your status is no longer valid indicate the end date (YY/MM). If your status is still valid indicate “current”)
If my passport is expired, is that means my citizenship status is also no longer valid? What should I put here if my passport is expired.. I am not clear here about the situation of "expired passport" and "validity of citizenship". Please reply!
No. You don't cease to be a citizen of your country just because your passport expires. For instance, to think that you lose Indian citizenship if your Indian passport expires is comical.
This space, generally speaking, is for work visas, study permits, previous resident permits etc. However, it is also very important that you mention your country of citizenship unless you are stateless. For your country of citizenship, you should mention the expiry date as 'current'.