The Internal Revenue Service (IRS) is seeking contractor support to provide procurement software and associated services for volunteer tax preparers under the Electronic Tax Software Application (ETSA) project. Performance will primarily occur at the contractor’s facility, with possible work at IRS, Treasury, VITA, or TCE sites. The contract includes a 12-month base period and four 12-month option periods. No specific budget amount is mentioned in the description. This opportunity is unrestricted under NAICS 541511 for Custom Computer Programming Services.