in subparagraph (B), a grant awarded under this section shall be for a period of 1 year and shall not be renewed other than through an application under paragraph (2). (B) Extended grants The Secretary may award a grant under this section for a period of not more than 3 years to any qualified return preparation program which— (i) received a grant under this section for the preceding year, and (ii) received a score of 90 percent or better on a technical evaluation. (c) Promotion and referral (1) Promotion The Secretary shall promote the benefits of, and encourage the use of, tax preparation through the Volunteer Income Tax Assistance program through the use of mass communications, referrals, and other means. (2) Internal revenue service referrals The Secretary may refer taxpayers to qualified return preparation programs receiving funding under this section. (3) Vita grantee referral Qualified return preparation programs receiving a grant under this section are encouraged to refer, as appropriate, to local or regional Low Income Tax Clinics individuals who are eligible to receive services at such clinics. (d) Authorization of Appropriations (1) In general For each of fiscal years 2017, 2018, 2019, 2020, and 2021, there are authorized to be appropriated $30,000,000 to carry out the purposes of this section. (2) Reservation From the funds appropriated under paragraph (1) for any fiscal year, the Secretary shall reserve not more than 3 percent for administration of the program. (3) Availability Amounts appropriated pursuant to the authority of paragraph (1) shall remain available without fiscal year limitation until expended. 5. National center To promote quality, excellence, and evaluation in volunteer income tax assistance (a) National center To promote quality, excellence, and evaluation in volunteer income tax assistance (1) Establishment There is hereby established the National Center to Promote Quality, Excellence, and Evaluation in Volunteer Income Tax Assistance (hereinafter in this section referred to as the