I have a EIN and a LLC, but business has been nonexistent since 12/07. I really don't want to close the business because I want to start again as soon as the economy gets better. I 've been sending the State Employment tax form back a "zero". But the IRS wants my quarterly tax. I am the only employee. I've had no employees since 12/07. How do I fill out the quarterly tax form? I still renew my LLC every year.