Multiple Support
Sometimes no one provides more than half of a person's support,
but two or more people together do provide more than half of the
support. In these situations, only one person may claim the
dependent exemption, and that person must have provided more than
10% of the individual's support. If more than one person provided
more than 10% of the support, those persons can agree among
themselves who will claim the individual as a qualifying
relative.
Each person who provided more than 10% of the individual's
support must sign a statement agreeing not to claim the dependent
exemption for the tax year. The person who claims the exemption
must keep the signed statements for his or her records, and must
identify in his or her return the persons who have agreed not to
claim the exemption. Form 2120, Multiple Support Declaration, may be
used for this.