Things You'll Need:
- W-2 wage earnings statements
- 1099 earnings statements detailing interest on savings accounts (1099-INT)
- stock dividends (1099-DIV) and foreign investment income (1099-0ID)
- Any other forms you received showing income or business losses
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Step 1
The simplest way to calculate whether your disability income is subject to federal income tax is to fill out "Worksheet A" in the forms section of the IRS Web site. The form directs you to add half the amount of your disability earnings as it appears in box 5 with all your other income--wages, interest, dividends, etc. If the total is more than $25,000, your disability benefits will likely be taxed.
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Step 2
You will then need to enter the information in your 1040 tax return. Fill in lines 7 through 19, transferring the amounts of income you received from any forms sent to you by employers or financial institutions.
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Step 3
On line 20a, fill in the amount that appeared in Box 5 of your SSA-1099 Social Security Benefit Statement. Divide line 20a by 2 and place that number in line 20b on the 1040 form.
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Step 4
Next, fill in lines 23 to 35, telling the IRS about any expense you had that might lower your taxable income. These are a very narrow set of expenses that include things like alimony payments, contributions to IRAs and student loan interest payments.
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Step 5
Add lines 23 through 31a and lines 32 through 35. Put the total on line 36, which represents your adjusted income.
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Step 6
1040 U.S. Individual Income Tax Return (p. 2).Your Social Security disability income will be taxed at the same rate as total taxable earnings. You do not pay tax on your total adjusted income, because you are entitled to standard deductions and in some cases, itemized deductions for certain tax-exempt expenses. Be sure to note your exemptions on page 2 of form 1040.
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Step 7
The tax rate depends on your total earnings after deductions. For 2009, the rates are: 10 percent for income up to $8,025; 15 percent for income up to $32,550; 25 percent for income up to $78,850; 28 percent up to $165,550; 33 percent for income up to $357,700; and 35 percent for any amount above $357,700.
















