Kale Ko Chartikala, I am not sure which form you are talking about that has the question regarding greencard. I did not come across any such question. But in case the counselor asks such question, you can always say that right now you are not sure about staying in US but have been thinking about further studies after gathering significant work experience. Do not worry, like someone above mentioned, H1 is a dual intent visa, so they are less likely to harass you like they would for F1 visa applicant. Well, I am not sure about the documents to take to Shram Bhivag as I knew someone there, I got my done without any official documents, except for my passport, and H1b approval form. They might ask you how many hours you work per week and how your work environment and working condition are. So on your letter from the employer, ask him/her to briefly write down that you work 40 hours (if that's the case) usually except for situation where more effort is required.