SECTION 1: Chapter 65C of the General Laws is hereby amended by striking out, in Section 1, subsection (a), as appearing in the 2016 Official Edition, and inserting in place thereof the following section:-

(a) “Code”, the Internal Revenue Code of the United States, in effect for the taxable year

SECTION 2: Chapter 65C of the General Laws is hereby amended by striking out, in Section 1, subsection (d), as appearing in the 2016 Official Edition, and inserting in place thereof the following section:-

(d) "Federal Gross Estate", the gross estate as defined under the code.

SECTION 3: Chapter 65C of the General Laws is hereby amended by striking out, in Section 1, subsection (f), as appearing in the 2016 Official Edition, and inserting in place thereof the following section:-

(f) “Massachusetts gross estate”, the federal gross estate, whether or not a federal estate tax return is required to be filed, plus the value of any property: (i) in which the decedent had at death a qualifying income interest for life described in subsection (c) of section 3A, or to the extent of any such interest therein of which the decedent has at any time made a transfer, by trust or otherwise, under any circumstances which would require the property to be included in the gross estate under the provisions of this chapter; and (ii) for which a deduction was allowed for Massachusetts estate tax purposes with respect to the transfer of such property to the decedent; and less the value of real and tangible personal property having an actual situs outside the commonwealth, but not the value of the principal residence of the decedent unless elected pursuant to the provisions of subsection (b) of section 2. The Massachusetts gross estate shall not include the value of any property in which the decedent had a qualifying income interest for life which is not otherwise includible in the Massachusetts gross estate under the first sentence of this subsection, notwithstanding the right of the executor of the decedent's estate to recover federal or Massachusetts estate taxes from such property.

SECTION 4: Chapter 65C of the General Laws is hereby amended by striking out, in Section 1, subsection (h), as appearing in the 2016 Official Edition, and inserting in place thereof the following section:-

(h) “Massachusetts taxable estate”, the Massachusetts gross estate less the exemption or the exclusions provided for within this section and deductions allowable under chapter 65C.

SECTION 5: Chapter 65C of the General Laws is hereby amended, in Section 1, by inserting after subsection (i), as appearing in the 2012 Official Edition, the following new:-

(j) “Applicable exclusion amount”, the sum of (i) the basic exclusion amount, and (ii) in the case of a surviving spouse, the deceased spousal unused exclusion amount.

(k) “Basic exclusion amount”, 50 per cent of the basic exclusion amount as defined in section 2010 of the Code.

SECTION 7. Section 3 of Chapter 65C of the General Laws, as appearing in the 2016 Official Edition is hereby amended by striking out the first paragraph and inserting in place thereof the following:- (a) for decedents dying after: (i) December thirty-first two thousand and nineteen an exemption equal to the Massachusetts net estate shall be allowed if the Massachusetts net estate is two million dollars or less; (ii) December thirty-first two thousand and twenty, an exemption equal to the Massachusetts net estate shall be allowed if the Massachusetts net estate is two million dollars multiplied by the percentage (if any) by which the Consumer Price Index, as defined by the Code, for the preceding calendar year, exceeds the Consumer Price Index for the calendar year 2005; provided that the exemption shall not exceed an amount equal to the smallest federal taxable estate that absorbs the allowable federal credit under section two thousand and ten of the Internal Revenue Code as amended and in effect as of the date of death of the decedent. Except for purposes of the final clause of subsection (a) of section two of chapter sixty-five C, if the Massachusetts net estate exceeds the amount of the exemption, no exemption shall apply.

SECTION 8: Chapter 65C of the General Laws is hereby amended by adding, in Section 3, the following new section after (d), as appearing in the 2016 Official Edition:- (e) “Deceased spousal unused exclusion amount”, with respect to a surviving spouse of a deceased spouse dying on or after January 1, 2017 and subject to paragraph 5 of section 2010 of the Code, the lesser of (i) the basic exclusion amount or (ii) the excess of the applicable exclusion amount of the last such deceased spouse of such surviving spouse, over the amount with respect to which the Massachusetts estate tax is determined under subsection (b) of the estate of such deceased spouse.

SECTION 9: Chapter 65C of the General Laws is hereby amended by striking out in Section 3A(f), as appearing in the 2016 Official Edition, the line “Such election, once made, shall be irrevocable and shall be separate from and independent of any election made by the executor for federal estate tax purposes” and inserting in place thereof the following:- “If no Massachusetts estate tax return is timely filed, such election may be made on the first return filed by the executor after the due date. Such election, once made, shall be irrevocable. The executor is not required to have made the same qualified terminable interest property election for federal estate tax purposes in order to make the election for Massachusetts purposes.”