Supplemental Security Income (SSI) is not taxable for your sister - so generally as long as she has no other income and other requirements are met - you may claim her as a dependent.
For requiremenst - see IRS publication 501 page 12 - Table 5. Overview of the Rules for Claiming an Exemption for a Depend
To determine if you are providing more than half of your sister's support - please fill on the page 20 - Worksheet 1. Worksheet for Determining Support
If you do - you may claim her as a dependent for tax purposes.
Let me know if you need any help or clarification.
So her SSi is not considered gross income?
That is correct - because it is not taxable it is not included into her gross income for dependency eligibility purposes. See in teh same publication page 17 - Gross income defined. Gross income is all income in the form of money, property, and services that is not exempt from tax.
Because Supplemental Security Income (SSI) is not taxable - it is not included into the gross income.
But I will have to put her SSI on line 1 of the worksheet for determing support. right?
Yes - that is correct - for support test these money should be considered as used for her own support.
wow by that I can't claim her then. That doesn't seem right she doesn't pay rent or any other bills. She just buys her own food, clothes and personal needs.
The matter is = if she provided more than half of her own support - or you provided more than half of her support. All expenses should be considered including housing, utilities, but if there are several persons living in your home - all common expenses should be divided between these persons to determine her support.
If she gets $940*12 = $11280 of her own funds and spends all for her own support - you may claim her as a dependent if you provided more than $11280 for her support - including rent, utilities and all other expenses that you paid for her.
That's alot so I can use my mortgage, lights, oil
You may use all expenses that you paid for her. If you have some common expenses - for instance utilities and there are two persons in your household - half will be treated as paid for her support. Here is a reference to teh IRS publication I mentioned above - just in case you need it - www.irs.gov/pub/irs-pdf/p501.pdf
If you own the home - you will use the fair rental value of the home - see line 6b worksheet on the page 20.
ok I think that is all I need.
You are welcome. Let me know if you need any help now or in future. Be sure to accept the answer - that is the only way experts are credited.