The 1040EZ & 1040 tax forms are used by those individuals who did not submit tax withholding throughout the year. They calculate the amount of taxes owed based on the income tax bracket. The main difference between the two forms is how complicated they are. Whether you are single or married filing jointly, you can use either form. You will find it easier to use the 1040EZ form if your taxes are relatively simple.
1040
The 1040 form calculates your taxable income based on a number of factors including your deductions. These deductions may be for charitable contributions, business expenses or even renter's credits. If you are planning on submitting a high amount of deductions during your income tax filing process, you should opt for the 1040 form.
1040EZ
If you are planning on taking the standard deduction for your income, then you can opt for the 1040EZ form. This form uses your earned income alone, minus any taxes you paid, to determine how much you owe come April. The standard deduction for your tax bracket will depend on your income. You will not have the opportunity to submit a high number of deductions or claims on this form. If you are filing with dependents, you need to use the 1040 form.