Volunteer Income Tax Assistance (VITA) Act - Directs the Secretary of the Treasury, through the Internal Revenue Service (IRS), to establish a Community Volunteer Income Tax Assistance Matching Grant Program (VITA grant program) for the development, expansion, or continuation of volunteer tax preparation programs to assist low-income taxpayers and members of underserved populations.

Establishes the National Center to Promote Quality, Excellence, and Evaluation in Volunteer Income Tax Assistance. Requires such Center to: (1) promote the adoption of a universally accessible volunteer training platform for the preparation of federal income tax returns, (2) provide technical assistance to tax return preparation program managers, (3) identify and disseminate best practices related to tax site management, (4) support outreach and marketing efforts, and (5) provide evaluation of programs and activities funded under this Act.