I graduated with a Masters in Computer Science in the USA in May 2010. I applied for post-completion OPT, started working on a full-time job since April 2010. Before my post-completion OPT expired, I applied for an OPT STEM extension, but while the application was pending, I decided to come back to India, and mailed USCIS about cancelling my application. Now, I wish to come back and work in the USA. Can I re-apply for extended OPT? I work in a company in India whose headquarters are in the US.