Form 1040A also gives you the chance to claim several adjustments to income. These items are sometimes referred to as above-the-line deductions, because you claim them just before the bottom line of the form, the one where you enter your adjusted gross income. By reducing your total gross income, your taxable income will be lower and your tax bill should be smaller, too.
Adjustments allowed on Form 1040A include educator expenses, certain IRA contributions, student loan interest, and some college tuition and fees.
Finally, choose Form 1040 if your earnings are larger, you itemize deductions or you have more complex investments and other income to report. This usually means added tax paperwork needs to be filed, too.
Additional paperwork also is associated with the many tax credits that show up only on the long Form 1040. The extra work, however, is offset by the added savings these credits, such as the one for taxes you paid to a foreign country or the one that helps cover some adoption costs, can produce for 1040 filers.
The longest tax return also offers more than a dozen above-the-line deductions that you can claim directly on the form itself (versus the four adjustments found on the 1040A). These allow you to reduce your gross income, thereby reducing the amount of income that's ultimately taxed. The adjustments include, among other things, breaks for alimony payments you made, self-employment taxes you paid or moving expenses you incurred.
These income deductions are found at the bottom of the 1040's front page, meaning you don't have to hassle with Schedule A and its itemizing limits. You will, however, have to fill out an additional form or schedule to claim a couple of these breaks.
You should file Form 1040 if:
- Your income, or combined incomes for joint filers, is more than $100,000.
- You itemize deductions.
- You have self-employment income.
- You received income from the sale of property.
The "Which form should I use?" section of IRS Publication 17 has more details, examples and special circumstances requiring additional forms.
And just because you got a particular income tax form in the past, that doesn't mean you have to use it. If your situation has changed -- say, you now have enough deductions to make itemizing worthwhile -- then file a different form.
It could be tax money in your pocket.