Tax Guide Learn the Top Reasons You Should Be Using IRS Form 1040 IRS Form 1040 for your personal tax return! Starting in on our review of the forms you’ll need for your personal tax return, PDFfiller takes an in depth look at ... Tax Guide Which Version of Form 1040 Do I Use For My Tax Return? This post was updated in April 2018 If there’s one type of IRS form that most Americans are familiar with, it’s Form 1040, the US Individual Income Tax Return. ...