Adoption tax credits. Provides a credit against adjusted gross income tax for qualified adoption expenses paid or incurred by a taxpayer who adopts a child. Provides that the credit does not apply to expenses incurred for stepparent adoptions or surrogate parenting arrangements or to expenses paid or reimbursed through an employer program or otherwise. Provides that the amount of the credit for each child adopted is the lesser of $5,000 or the total of the qualified adoption expenses for the child. Provides a credit against adjusted gross income tax for qualified adoption expenses paid or incurred by a taxpayer who adopts a special needs child after December 31, 2003. Provides that the amount of the credit for each special needs child adopted is the lesser of $6,000 or the total of the qualified adoption expenses for the child.