On this Question: "Tell us about the health-related accounts you had in 2017". I have HSA acc, my wife is dependent on my HSA. Will both of us tick HSA box or just me?

In this case, you only mark you.  Although she is allowed to have a separate HSA with your qualifying HDHP insurance, your question states that she does not have one.  Therefore, you only need to check the box for yourself.

{Edited 1/27/18: 8:06 PST}