Section 6 of chapter 62 of the General Laws, as appearing in the 2012 Official Edition, is hereby amended by striking subsection (h) and inserting in place thereof the following new subsection:

"(h) A taxpayer shall be allowed a credit against the taxes imposed by this chapter if such person qualified for and claimed the earned income credit, so called, allowed under the provisions of section 32 of the Code, as amended and in effect for the tax year. With respect to a person who is a nonresident for part of the taxable year, the credit shall be limited to 15 per cent of the federal credit multiplied by a fraction, the numerator of which shall be the number of days in the tax year the person resided in Massachusetts and the denominator of which shall be the number of days in the taxable year. Persons who are nonresidents for the entirety of the taxable year shall not be allowed the credit. The credit allowed by this subsection shall equal 15 per cent of the federal credit received by the taxpayer for the taxable year. If other credits allowed under this section are utilized by the taxpayer for the taxable year, the credit afforded by this subsection shall be applied last. If the amount of the credit allowed hereunder exceeds the taxpayer's liability, the commissioner shall treat such excess as an overpayment and shall pay the taxpayer the amount of such excess, without interest."