Usually that would be no unless you provided more than half of her support for the year you are filing taxes
Unless you totally support her and she is your dependent you can't claim her on your taxes.
Just claim one more exemption as a dependent. You can claim up to 25 if they go to college in many states.
Yes, you can claim a qualifying dependent.
Yes you can claim anyone as a dependent if there living under your roof.
You may never claim your spouse as a dependent. You may, however, claim a standard exemption for your spouse if she does not have to file and you are not filing jointly (and as long as no one else is claiming her as a dependent).
If the "dependent" brother is under 19 and is not a full time student then you can not claim him as a dependent and you can not claim Head of Household status. How old is this brother?
I would yes
Yes
You can claim them if you provided for the person the year you want to claim him or her.
If the incarcerated person was not incarcerated for the entire year, he was still an eligible dependent. Also, if the incarcerated person is under 18 and the parent's provide his support while he is incarcerated he can also be claimed as a dependent.
If they aren't a qualified child or a qualified relative, as defined, you can't claim them.
No, you cannot claim single head of household unless someone you claim as a dependent lives in your home.