This bill amends the Internal Revenue Code to modify the matching funds requirement for grants provided to low-income taxpayer clinics (LITCs). It mandates that LITCs provide matching funds equal to an applicable percentage of the grant, generally 100%, but allows the Secretary of the Treasury to reduce this to as low as 25% to expand taxpayer coverage. The legislation clarifies that eligible matching funds include the salary and fringe benefits of personnel and the cost of equipment, while explicitly excluding indirect expenses like general overhead. These changes aim to provide greater flexibility for clinics to meet their obligations and potentially serve more taxpayers. The amendments will apply to calendar years beginning after the Act's enactment.