[b]I have a valid H4 visa and is planning to apply H1B in April 2014. I'm also planning to travel to US from India during May 1st week on H4 visa. [/b] Question 1. Will this affect my H1B petition in anyway? [b]Now, I only want to start working in March 1st 2015 (due to health issues) instead of October 1st 2014. [/b] Question 2. If my H1B get approved, will my visa status gets converted to H1B automatically on Oct 1st 2014? If yes, how can I choose to continue on H4 till March 2015? Question 3. If I can get it extended till March 2015, what is the process to change it to H1B then. Question 4. Will I have to get H1B visa stamped to start working? Thanks a lot!