"Excessive amount" means the amount by which the amount of the claim for refund or credit for any taxable year exceeds the amount of the claim allowable for such taxable year.
"Reasonable basis" means a standard of care used in tax reporting that is significantly higher than not frivolous or not patently improper. A reasonable basis position will be more than arguable and based on at least one or more authorities of either state or federal tax administration. A position is considered to have a reasonable basis if a reasonable and well-informed analysis by a person knowledgeable in tax law would lead that person to conclude that the position has approximately a one-in-four, or greater, likelihood of being sustained on the merits. A reasonable basis includes innocent mistakes where the excessive amount is the result of inadvertence, mathematical error, or where otherwise defined as innocent by the director pursuant to a formal pronouncement issued without regard to chapter 91.
HRS § 231-36.8
Applicability of 2009 amendment. L 2009, c 166, §27.