If you're illegible for 1040 (not NR) then most software will take you to 1040EZ if you are single and you do not have mortgage interest to pay and no tuition interest to deduct ( for tuition  1040 or 1040 A )

To enjoy itemized deduction must have mortgage interest , real estate tax and state tax , health expense over 7.5 percent of your AGI and job seeking deduction will be any thing over 2% of your AGI , excise tax , donations ( some more) all total vs your standard deduction which ever is higher , you will chose to deducted. Now you figure out if you are illegible for Itemized deduction or not. 

Software use is easier to file tax but if you want to know about tax suggested to get the 1040 instruction book that will be available in post office and library. May take couple hours but will prepare you for paper filing and make you understand what you can deduct and what not.

Now many tax preparation software are advertising for free e-filing, but I have been using Tax Act for couple years and easy to use as TurboTax but cheaper. Thank you.