There is no confusion, as I said above, you file 1040 NR EZ. There is a software available to fill the tax form for F1 student too but it will create a filled out form 1040 NR EZ. You have to take a print out and mail the form. I forgot the name of the software. May be there are other softwares too.  If you are using any other software, you will probably using other forms that you are not supposed to use. No other form will work for F1 not even 1040 NR.

If you use a software, make sure that software is designed for F1 student and that should be able to generate form 1040 NR EZ. Form 1040 NR EZ can not be filed online. However, if you have already spent 5 yrs in the US even if as a student, you can use 1040. If you are transioning from OPT to H1, you can wait until the first week June of the follwoing year (to meet the substential precense test) to file the tax and file as a US resident. If you want to wait until June, you have to file a form for extension within the 15 th of April.

There are so many people who say, my friends did this and that. You can keep on saying that but that does not change the tax regulation. Usually, IRS is not after small money, that's is why usually no one is caught. One one can stop you the way you want to file your tax return.

Hope this helps.