Although there are series of IRS 1040 income tax forms, the most used are the 1040, 1040A and 1040EZ. The 1040 tax form is also known as the long form, while the 1040EZ is often called the short form. These forms are used to file your federal income tax information, which must be received by the IRS by April 15 of the following year. The biggest quandary, when filing your federal income taxes, may be whether to use the IRS tax form1040, 1040A or 1040EZ. It can be helpful, especially if you are unsure of your abilities to complete your tax forms, to request assistance from a local income tax filing agency or accountant.Tax Form 1040EZConsider some general rules, when deciding if the 1040EZ tax form is best for your particular situation.Your taxable income is below $100,000You have a filing status of Married filing jointly or you are singleYou have no dependents to claimYou, and your spouse, are under the age of 65 and are not blindAny interest income totals $1,500 or lessTax Form 1040AConsider using the IRS tax form 1040A to file your federal income tax if you must claim the following:You have taxable income below $100,000.Your income includes capital gains distributions.Particular tax credits are to be claimed.There will be adjustments in your income for student loan interest or IRA contributions.Tax Form 1040The most used IRS form for filing the federal income tax report is the regular 1040 form. Even if you don't make $100,000 taxable income, you should file this form if you are self employed, have income property to claim or need to itemize deductions.You have taxable income that is $100,000 or above.You must itemize your deductions to get the most benefit.Your income, in part or full, is from self employment.A sale of a property is included as part of your income.Most importantly, making an appointment with a local professional tax preparer, if you are in doubt about preparing your own federal income tax report, will ease your mind in knowing all your tax forms are prepared properly.