A taxpayer who employs an apprentice pursuant to an apprentice agreement registered with the Office of Apprenticeship of the Employment and Training Administration of the United States Department of Labor is allowed a credit against an income tax imposed pursuant to this chapter equal to one thousand dollars for each apprentice employed. A credit is not allowed unless the apprentice was in the employ of the taxpayer for at least seven full months of the taxable year and a credit is not allowed for an individual apprentice for more than four taxable years. The department shall prescribe a form to claim this credit that provides information to the department sufficient for the proper administration of this credit.