To start with, I am going to assume that the child is the biological child of both of you and that you live together. In that case, only one person can claim all the tax benefits -- dependent exemption, child tax credit, head of household filing status (sometimes), EIC (sometimes), and dependent care credit or tax-free FSA.
The Statute IRC 501(c)(4) provides for exemption of: Civic leagues or organizations not organized for profit but operated. exclusively for the promotion of social welfare. Local associations of employees, the membership of which is limited to the. employees of a designated person or persons in a particular municipality.
The decision to adopt a non profit legal structure is one that will often have taxation implications, particularly where the nonprofit seeks income tax exemption, charitable status and so on. The nonprofit landscape is highly varied, although many people have come to associate NPOs with charitable organizations. nonprofit may have a delegate structure to allow for the representation of groups or corporations as members. Alternatively, it may be a non-membership organization and the board of directors may elect its own successors.