Hi,
Recently i applied for h1 in 2013 with COS from H4 to H1 and got it in lottery. I got RFE and employer is planning to respond in few weeks. Now i got a project and my question is can i start work?
No you need to get your H1B approved ( since your status is H4) with COS before you can start to work. Do a premium processing your case will get adjudicated in 15 days. it costs $1225