(a) General. — Subject to the limitations specified in subsection (b) of this section, interest shall be allowed and paid upon any overpayment in respect of any tax imposed by this title or Title 4 at the rate of 0.5% per month, or fraction thereof.

(b) Limitations. — (1) No interest shall be allowed or paid on any overpayment of less than $1.00.

(2) Interest shall be allowed and paid on any overpayment in respect of any tax from the forty-sixth day (ninety-first day in the case of the tax imposed under Chapter 19 of this title) after the date on which a claim for credit or refund (or an amended return claiming a credit or refund) is filed, to (i) in the case of a refund, the date of the refund, or (ii) in the case of a credit, the due date of the amount against which the credit is taken.

(3) [Repealed.]

(c) Early returns and advance payments. — For purposes of this section and § 539 of this title:

(1) Any return filed before its due date shall be considered as filed on such due date.

(2) Any tax paid by the taxpayer before its due date shall be considered as paid on such due date.

(3) For purposes of paragraphs (c)(1) and (2) of this section, the due date for filing a return or paying the tax shall be determined without regard to any extension of time granted the taxpayer.

(4) Any income tax actually deducted and withheld from the taxpayer, and any amount paid by the taxpayer as estimated or tentative income tax shall be deemed to have been paid by the taxpayer on the due date of the taxpayer’s income tax return (determined without regard to any extension of time for filing) for the taxable year with respect to which such tax constitutes a credit or payment.

(d) Refund of income tax caused by carry back. — For purposes of subsection (a) of this section, if any overpayment of tax imposed by Chapter 11 or Chapter 19 of this title results from a carry back of a net operating loss or net capital loss, such overpayment shall be deemed not to have been made prior to the filing date for the taxable year in which such net operating loss or net capital loss arises.

68 Del. Laws, c. 187, § 1; 70 Del. Laws, c. 186, § 1; 75 Del. Laws, c. 411, § 4; 77 Del. Laws, c. 79, §§ 4-6.