Can I claim my live in girlfriend?

[Heather14]

She could qualify as a dependent on your tax return as a qualifying relative if:

• She was a member of your household the entire year.
• The relationship between you and the dependent does not violate the law (you can’t still be married to someone else.  Also check your individual state law. Some states do not allow you to claim a boyfriend or girlfriend as a dependent even if your relationship doesn’t violate the law).
• You meet all the other criteria for “qualifying relatives” (gross income and support).

In order to determine  if she meets the IRS definition of a "qualifying relative" please see the following TurboTax FAQ:

https://ttlc.intuit.com/replies/3288503