Thanks for your response.
Yes, I know I can renew my passport. Is it advisable to renew the passport before applying for extension? My query is that if I apply with my existing passport does that make my Tier-1 extension application invalid or can cause any issue with extension?

Hello Everybody, I have my Tier-1 Extension due in mid december 2011 and my passport is valid till early april 2012. I am planning to book appointment with PEO in mid October. Can I apply for extension with this passport (as it will be valid for next 6 months and my extension would be for 2 years) o...