Your data says which you have have been given provided the monetary help for the two your gf and your son. in the journey that your son has consistently lived with you and he did no longer furnish better than a million/2 of his own monetary help (variety of puzzling at seven months!), then you definitely are eligible to declare him as a based. Your gf can't. in case you bypass the "lived with you / you provided the help" exams above, it is all it is needed for you have the skill to declare your son. Your gf is definitely incorrect while she states which you will no longer declare him without her signature or approval. you do no longer desire her signature or her approval. i could element out that in case you each document a tax return and the two one in all you declare your son, this could enhance a purple flag with the IRS and that they'll ask each of you to coach which you provided the monetary help for the child, and whoever can't practice which would be in some extra warm water with the IRS. in case you're claiming your son and are not married, you ought to document as "Head of relatives" and then declare your son, entering into his social protection variety the place indicated on your tax return. submitting as Head of relatives provides you with a larger exemption, which will decrease your tax liablity and the two shrink the quantity you owe or enhance the quantity you get decrease back. Claiming your infant provides you with yet another exemption, and additionally will help you declare a infant Tax credit, that's certainly $one thousand to apply on your tax. in case you owe tax, the $one thousand would be utilized to what you owe. in case you owe no longer something, the U. S. government provides you with that $one thousand in money as component to your refund.