Can I clam my girlfriend kids since I handle all expense and is head of house hold

[BobinCT · Accepted solution]

You cannot claim head of household even if you claim them.  Head of Household requires that your dependent be a relative of yours.

[SherekaB]

You can claim the children as dependents if they are your qualifying relatives. See below to see if they qualify.

The 4 tests that will qualify a relative as a dependent are:

• Qualifying Child: They are not the “qualifying child” of another taxpayer or your “qualifying child”.
• Gross Income: The dependent being claimed earns less than $4,050 in 2017.
• Total Support: You provide more than half of the total support for the year.
• Member of Household or Relationship: The person (a friend, girlfriend, non-blood relative) must live with you all year as a member of your household.

https://blog.turbotax.intuit.com/tax-deductions-and-credits-2/family/who-can-i-claim-as-a-dependent-...

Read below to see the qualifications for Head of household which requires a qualifying person. 

https://ttlc.intuit.com/replies/3288637