Assuming you are over age 18 and over 23 if a full-time student:

You do not need to live with her for her to claim you but she must pay more than  half of your total support for the year in order to do so.  If SSI is your only income then it does not count for the $4,200 limit.

---Tests to be a Qualifying Relative (& Unrelated Persons)---
(Must meet ALL of these tests to be a dependent)

1. The person cannot be your qualifying child or the qualifying child of any other taxpayer.

2. The person either must be related to you, or must live with you all year (all 365 days - There are exceptions for temporary absences such as school, illness, business, vacation, military service) as a member of your household.

3. The person's gross income for the year must be less than $4,200 (tax-exempt income, such as certain social security benefits, is not included in gross income)

4. You must provide more than half of the person's total support** for the year.

5. The person is not filing a joint return.

In any case, the person must be a U.S. citizen, U.S. resident alien, U.S. national, or a resident of Canada or Mexico

The above is simplified; see IRS Publication 501 for full information.
https://www.irs.gov/publications/p501#en_US_2018_publink1000220939

** Worksheet for determining support
https://www.irs.gov/publications/p501#en_US_2019_publink1000226268

Well I haven't lived with her for about 3 years now I do not get income from her

I do not have a job of any kind I am on SSI for mental disability but I am competent enough to be my own Payee

And idk how to do any of the extra stuff u mentioned

Dose that mean she still can or?

And I am in G.E.D classes that I take 12 hours a week i dont know if that part counts or not and I pay the small fee every quarter for my classes and I am at the age of 21 years of age

I just need a direct yes or no answer I am sorry if my reply seems repetitive to my question I am not exactly greate at comprehending these sorts of things...

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@KaylaLee333 wrote:

Well I haven't lived with her for about 3 years now I do not get income from her

 

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Then you cannot be a dependent.    Not much that you can do if you do not file a tax return.  You can, but a zero tax return cannot be e-filed, must be mail filed.  That "might" start a IRS investigation, but expect a year or so.

Also:

https://www.irs.gov/individuals/how-do-you-report-suspected-tax-fraud-activity

Well it's good to know that she can't legaly do it

And thank you for the link and your help let's just hope she doesn't try to do it illegally