OPINION
¶ 1 After a trial to the court, the trial judge found that decedent Benjamin Pouser had intended that appellee Suzanne Pouser, Benjamin’s second wife, inherit the maximum amount allowable under the federal estate tax marital deduction in effect at the time of his death and that Suzanne was therefore entitled to Benjamin’s entire estаte, to the exclusion of appellants Richard Pouser, Harold Pouser, and Amy Pouser Webb, Benjamin’s children by a previous marriage. 1 The court of appeals reversed the judgment, ruling that the trial court’s findings as to Benjamin’s intent were clearly erroneous. We granted Suzanne and appellee Thomas Filip’s petition for review and now vacate the court of appeals’ decision and reinstate the trial court’s judgment because we conclude the trial court’s finding of Benjamin’s intent was supported by substantial evidence.
FACTS
¶2 We view the facts in the light most favorable to supporting the trial court’s judgment.
Aztec Film Productions, Inc. v. Prescott Valley, Inc.,
¶ 3 When Benjamin died in 1993, he was survived by Suzanne and appellants. Pursuant to Benjamin’s will, the court appointed Suzanne and her nephew, appellee Filip, as personal representatives of Benjamin’s estate. They interpreted Benjamin’s will as devising his entire estate to Suzanne’s marital trust, thereby utilizing the unlimited federal estate tax marital deduction then in еffect and, due to Suzanne’s amended will, effectively disinheriting appellants.
¶ 4 Appellants filed a petition to construe the will, asserting that the maximum marital deduction in effect at the time Benjamin executed his will allowed Suzanne to receive a maximum of $250,000 from his estate. 2 The trial judge held a trial to the court, considered extrinsiс evidence, and ruled in favor of Suzanne.
BENJAMIN’S WILL
¶ 5 The Third paragraph of Benjamin’s will provided that the marital trust was to be funded with “an amount of property equal to the maximum marital deduction allowable in determining the Federal Estate Tax imposed upon my estate under the Internal Revenue Code of 1954, or such similar provisions under any rеvenue act that may be in effect at the time of my death____” It further stated:
It is my object to secure the full benefit of the maximum marital deduction allowable for Federal Estate Tax purposes under the Federal Estate Tax law in effect upon my death. Accordingly, the terms of this will shall be construed to fulfill this objective. Any provision of this Will which may conflict with my said objective shall be reconciled or ignored to the end that the full marital deduction may be allowed with respect to my estate.
Appellants’ trust was to be funded with the residue “remaining after the funding of the SUZANNE POUSER MARITAL TRUST.”
¶ 6 The devolution of Benjamin’s estate is controlled by state law, which looks to his intent, A.R.S. § 14-1102(B)(2);
In re Estate of Krokowsky,
TRANSITIONAL RULE
¶7 In 1976, the marital deduction was increased to the greater of $250,000 or one-half the estate. I.R.C. § 2056(c) (1976). The Economic Recovery Tax Act of 1981, Pub.L. No. 97-34, 95 Stat. 172 (1981) (the ERTA) further amended § 2056 to provide for an unlimited marital deduction. ERTA § 403(a). Recognizing that the ERTA might have an unintended impact on existing wills, Congress provided a transitional rule, ERTA § 403(e)(3), which states that the limited preERTA deduction will still apply if:
(A) the decedent dies after December 31, 1981,
(B) by reason of the death of the decedent property passes from the decedent or is acquired from the decedent under a will executed before the date which is 30 days after the date of the enactment of [the ERTA], or a trust created- before such date, which contains a formula expressly providing that the spouse is to receive the maximum amount of property qualifying for the marital deduction allowable by Federal law,
(C) the formula referred to in subparagraph (B) was not amended to refer specifically to an unlimited marital deduction at any time after the date which is 30 days after the date of enactment of [the ERTA], and before the death of the decedent....
*578 The Senate report explained the rule as fol- . lows:
The committee is concerned that many testators; although using the formula clause, may not have wanted to pass more than the greater of $250,000 or one-half of the adjusted gross estate (recognizing the prior law limitation) to the spouse. For this reason, a transitional rule provides that the increased estate tax marital deduction, as provided by the bill, will not apply to transfers resulting from a will executed ... before the date which is 30 days after enactment, which contains a maximum maritаl deduction clause____
S.Rep. No. 97-144, at 128 (1981),
reprinted in
1981 U.S.C.C.A.N. 105, 229. Although the transitional rule speaks in absolute terms, the courts interpreting it, relying on its stated purpose, have held that it will not be applied to defeat the intent of the testator.
See Liberty Nat’l Bank & Trust v. United States,
¶ 8 One expression of intent is a directive in a will that the maximum marital deduction in effect at the time of the testator’s death aрply to the estate. The Internal Revenue Service (IRS) has determined that the transitional rule does not apply when the terms of a will indicate that subsequent changes in the federal estate tax law on the marital deduction should'apply to the estate.
See
Rev. Rul. 80-148, 1980-
¶ 9 Similarly, courts have recognized that a will which specifically refers to the marital deduction in effect at the time of the decedent’s death is not governed by the trаnsitional rule.
Kreigh,
INTERPRETING WILLS
¶ 10 In attempting to ascertain the testator’s intent, we consider the text of the will as a whole and, when appropriate, the circumstances at the time it was executed.
In re Estate of Smith,
IMPLEMENTATION OF THE TRANSITIONAL RULE
¶ 11
Kreigh
and the IRS interpret time-of-death marital deduction provisions as preventing application of the transitional rule as a matter of law.
See also Liberty Nat’l Bank,
¶ 12 Questions of fact, however, may be subject to presumptions which shift the burden of going forward with evidence.
In re Hesse’s Estate,
BENJAMIN’S INTENT
¶ 13 Benjamin’s will became reasonably susceptible to two interpretations upon passage of the ERTA with the transitional rule.
See Arend,
¶ 14 The trial court relied on the provisions in the Third paragraph of Benjamin’s will, which emphasized that Benjamin’s primary intent was to maximizе the marital deduction and specifically required that the marital deduction in effect at the time of his death apply to his estate. Although the initial presumption we have established in favor of the unlimited marital deduction applies here because of the time-of-death marital deduction directive in Benjamin’s will, the trial court received evidence concerning Benjamin’s disinherited heirs and concerning the notes and standard drafting practices of the attorney who drafted the will. This evidence *580 contradicts the presumption and supports the appellants’ position that Benjamin only intended to devise Suzanne an amount equal to the prior limited marital deduction. We will, therefore, also examine, in addition to the directive, the other evidence supporting the trial court’s finding.
¶ 15 As the trial court noted, other provisions of Benjamin’s will demonstrated his intent to place Suzanne’s interests ahead of the remainder interests: the survival clause established a conclusive presumption that Suzanne survived Benjamin, and the tax clause required that the residuary estate bear all estate taxes and expenses and that the marital trust bear none. The trial court also found “credible and compelling” the testimony of Louis Comus, an attorney who testified as an expert witness on the application of the transitional rule. Because construction of the will required an analysis of a complex federal estate tax question, the trial court properly received expert testimony. Ariz. R. Evid. 702, 17A A.R.S; see
In re Estate of Lenahan,
¶ 16 Finally, as the dissent in the court of appeals points out, the pattern of conduct between Suzanne and Benjamin further supports the trial court’s finding. After entering a prenuptial agreement to keep their estates separate and to provide nothing for Suzanne upon Benjamin’s death, Benjamin later executed a will giving Suzanne $50,000 and finally revoked the prenuptial agreement and executed the will at issue giving Suzanne the maximum marital deduction trust.
¶ 17 The trial court’s conclusion does not render the provisions conсerning appellants’ trust or any other provision of the will meaningless. If Suzanne had died first, or if the marital deduction had not become unlimited, these provisions would have taken effect and were vital to creating a complete estate plan. Even if they had been rendered meaningless, however, Benjamin expressly direсted that any provision that conflicted with maximizing the marital deduction be “reconciled or ignored.”
¶ 18 Substantial evidence supported the trial court’s finding of Benjamin’s intent, and despite conflicting evidence the court made no clear error.
Whittemore,
¶ 19 Although appellants have attempted to distinguish factually some transitional rule decisiоns and have relied on others, we believe our conclusion is in basic harmony with these decisions. Appellate courts have generally affirmed the trial courts’ findings of the testator’s intent when they are supported by substantial evidence, whether the trial court applied the unlimited marital deduction,
Bruning; Kreigh,
or the marital deduction in еffect at the time of the execution of the will.
Arend; Liberty Nat’l Bank; In re
*581
Hickock,
¶ 20 Because substantial evidence supports the trial court’s finding, under state probate law or federal tax law, that Benjamin’s intent was to take advantage of the unlimited marital deduction in effect at the time of his death, we vacate the court of appeals’ opinion and reinstate the trial court’s judgment.
Notes
. The trial court also ruled in favor of Suzanne and her cоpersonal representative, appellee Thomas Filip, on appellants’ allegations of breach of fiduciary duty and confidential relationships. Although we also granted review of the court of appeals’ reversal on these issues, we need not reach these issues because we reinstate the trial court’s judgment on the distribution of the estate.
. Appellant’s petition does not mention a marital deduction of one-half of the estate. See I.R.C. 2056(c) (1976) (increasing marital deduction from one-half of the estate to the greater of $250,000 or one-half the'estate).
. Although this revenue ruling dealt with a transitional rule under the 1976 Tax Reform Act, thе language of the 1976 transitional rule and the House explanatory report were virtually identical to the rule and Senate report here,
see
Rev. Rul. 80-148, 1980-
