I support someone, but I'm not sure if I'm able to have them on my tax's as a dependent.

[theodoresschool]

She lost her job for about 4-5 months, Lived with me, Supported her with gas, food, rides* (too school.) other things she needs. She is a resident of mexico as well.

[NancyG]

Following you will find information to help you determine for if you can claim her as a dependent:

It's OK if you're still not sure about your dependent situation. We'll ask you all the right questions to figure out all your dependent details.

Who can I claim as my dependent? 

You can claim a child, relative, friend, fiance (etc.) as a dependent on your 2016 taxes as long as they meet all of the following requirements :

• You provided more than half of their financial support. More info
• They made less than $4,050 in gross income during 2016 unless they are a qualifying child.
• They live with you or they are related to you.
• They are a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.
• They aren't (or won't be) claimed as a dependent by someone else.
• They aren’t filing a joint return with their spouse.
• You are not being claimed as a dependent on someone else's return.

Related Information:

• Does a dependent have to live with me?
• What does "financially support another person" mean?
• Can I claim myself or my spouse as a dependent?
• Can I claim my parent as a dependent?
• Can I claim my relative or friend as my dependent?
• How do I add or remove a dependent?