Transition to Adulthood Program Act of 1999

Transition to Adulthood Program Act of 1999 - Amends part E (Foster Care and Adoption Assistance) of title IV of the Social Security Act and the Internal Revenue Code with regard to the transition of foster children to self-sufficiency, including the provision of nonresidential services to assist in such transition, making respective changes chiefly: (1) allowing States with approved part E plans to make foster care maintenance payments with respect to a child who has not attained age 21 who would otherwise be ineligible for such payments because of age if the child is completing secondary education, is enrolled in an institution that provides postsecondary education or vocational training, or is employed for at least 80 hours per month, and has a case plan providing for the child's achievement of independent living and residence in a setting that promotes personal responsibility; and (2) expanding the work opportunity tax credit to include certain individuals who, on the day before before attaining age 18, received foster care maintenance payments under an approved State part E plan or were in foster care under the responsibility of the State. Provides for an increase in the amount of assets allowable for children in foster care under SSA title IV part E. Directs the Secretary of Health and Human Services (HHS) to establish an action plan to promote collaboration between HHS and other Federal programs to promote the self-sufficiency of children aging out of foster care. Provides, with respect to the independent living initiatives program under SSA title IV part E, for: (1) the use of updated foster care data in the funding formula for determining the basic amount for such program for a State for a fiscal year (while removing State entitlement to such basic amount under State plan provisions); and (2) a funding increase under such program.