When to apply for H1B visa stamping after approval ?
If confused after reading all three, my personal opinion after all these three is, “You should apply for H1B visa stamping at least 90 days prior to your entry date to US or start date of work in US”. So, if your start date is October 1st for H1B visa, you should apply for visa stamping around July 1st or late June for proper processing and visa on time. If I were you, I would call the embassy or service like VFS ask them for clarification because it may vary slightly depending on state and country.