I do not know why you are not responding, but you are not charged per question, per response, nor per answer. So after I give you my answer, you can continue to ask me questions without additional charge until you are satisfied. I apologize if it is a site issue that you posted and the post did not go through. I will post your answers now, but please do not make me spend this time without compensation. The only way the website compensates me is if you leave a positive rating. It does NOT cost you anything to do so.
1) There is no grace period, so you cannot stay. They usually will not say anything if you leave within 10 days, but after that, it gets harder and harder to prove to a visa officer that your overstay was brief, reasonable and will not happen again. At 180 days overstay (unlawful presence), it is a 3 year bar that you cannot come back to the U.S. without a very hard to get waiver. At one year of unlawful presence, it is a 10 year bar.
2) That is not allowed. No more grace period. You would have to leave the U.S. to get H-1B visa stamping outside of the U.S.
3) Immediately upon coming off payroll.
4) Yes but if you have already come off payroll, you need to leave the U.S. as quickly as possible to go for H-4 visa stamping outside of the U.S.
My goal is to provide you with excellent service – if you feel you have received anything less, please reply back as I am happy to address follow-up questions and there is no additional charge. Also, should you need to chat on the phone, private email or need help reviewing documentation, I am happy to do so for a small additional cost. Let me know if you are interested in these – I am happy to give you more details! When we are done, if you would be so kind as to leave a positive rating for my service, I would sincerely ***** ***** You can do that by clicking on the 3rd, 4th or 5th stars if you see them, or the smiley faces if you see them. You can even ask additional questions without additional charge even after leaving a positive rating. Thank you for your understanding.