I am not doing my own taxes, where do I get the information required on Part ll of Form 4868(Tax Extension)?

Answer 1

http://www.irs.gov

Answer 2

If nothing changed much from last year, you'd be pretty safe if you took last year's total tax from your last year's return (I hope you have a copy), increased it a couple hundred dollars, and put that down on line 1. You can take your payments from your W-2, plus an estimated tax you paid if you sent in quarterly payments.

Answer 3

You need to "do your own taxes" or have someone do it for you, estimating the numbers that will be on the return when you finally file the real one.