Yes, you can claim a qualifying dependent.
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
No, you cannot claim single head of household unless someone you claim as a dependent lives in your home.
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
You can claim them if you provided for the person the year you want to claim him or her.
No, you cannot claim single head of household unless someone you claim as a dependent lives in your home.
If they aren't a qualified child or a qualified relative, as defined, you can't claim them.
No
No, sorry. You can only claim someone related to you as a dependent.
No, medical expenses for a dependent can only be claimed by the person who is claiming him or her as a dependent.
You are not eligible to claim yourself as a dependent on your federal taxes -- ever. However, you are allowed to claim a personal exemption for yourself if and only if no one else can claim you as a dependent, whether or not they actually claim you.