Okla. Stat. tit. 68, § 68-217

refunds.

A. If any amount of tax imposed or levied by any state tax law,

or any part of such amount, is not paid before such tax becomes

delinquent, there shall be collected on the total delinquent tax

interest at the rate of one and one-quarter percent (1 1/4%) per

month from the date of the delinquency until paid.

B. Interest upon any amount of state tax determined as a

deficiency, under the provisions of Section 221 of this title, shall

be assessed at the same time as the deficiency and shall be paid

upon notice and demand of the Oklahoma Tax Commission at the rate of

one and one-quarter percent (1 1/4%) per month from the date

prescribed in the state tax law levying such tax for the payment

thereof to the date the deficiency is assessed.

C. If any tax due under state sales, use, tourism, mixed

beverage gross receipts, or motor fuel tax laws, or any part

thereof, is not paid within fifteen (15) days after such tax becomes

delinquent a penalty of ten percent (10%) on the total amount of tax

due and delinquent shall be added thereto, collected and paid.

Oklahoma Statutes - Title 68. Revenue and Taxation Page 86

However, the Tax Commission shall not collect the penalty assessed

if the taxpayer remits the tax and interest within sixty (60) days

of the mailing of a proposed assessment or voluntarily pays the tax

upon the filing of an amended return.

D. If any tax due under any state tax law other than those

specified in subsection C of this section, or any part thereof, is

not paid within thirty (30) days after such tax becomes delinquent a

penalty of ten percent (10%) on the total amount of tax due and

delinquent shall be added thereto, collected and paid. However, the

Tax Commission shall not collect the penalty assessed if the

taxpayer remits the tax and interest within sixty (60) days of the

mailing of a proposed assessment or voluntarily pays the tax upon

the filing of an amended return.

E. If any part of any deficiency, arbitrary or jeopardy

assessment made by the Tax Commission is based upon or occasioned by

the taxpayer's negligence or by the failure or refusal of any

taxpayer to file with the Tax Commission any report or return, as

required by this title, or by any state tax law, within ten (10)

days after a written demand for such report or return has been

served upon any taxpayer by the Tax Commission by letter, the Tax

Commission may assess and collect, as a penalty, twenty-five percent

(25%) of the amount of the assessment. For purposes of this

subsection, "negligence" shall mean the consistent understatement of

income, consistent understatement of receipts or a system of

recordkeeping by the taxpayer that consistently results in an

inaccurate reporting of tax liability.

F. If any part of any deficiency is due to fraud with intent to

evade tax, then fifty percent (50%) of the total amount of the

deficiency, in addition to such deficiency, including interest as

herein provided, shall be added, collected and paid.

G. All penalties or interest imposed by this title, or any

state tax law, shall be recoverable by the Tax Commission as a part

of the tax with respect to which they are imposed, the penalties

bearing interest as provided in this section for the tax, and all

penalties and interest shall be apportioned as provided for the

apportionment of the tax on which such penalties or interest are

collected.

H. 1. Whenever an income tax refund is not paid to the

taxpayer within ninety (90) days after the return is filed or due,

whichever is later, with all documents as required by the Tax

Commission, entitling the taxpayer to a refund, then the Tax

Commission shall pay interest on the refund, at the same rate

specified for interest on delinquent tax payments. The payment of

interest on refunds provided for by this section shall apply to tax

year 1987 and subsequent tax years. The Tax Commission shall not be
or due,

whichever is later, with all documents as required by the Tax

Commission, entitling the taxpayer to a refund, then the Tax

Commission shall pay interest on the refund, at the same rate

specified for interest on delinquent tax payments. The payment of

interest on refunds provided for by this section shall apply to tax

year 1987 and subsequent tax years. The Tax Commission shall not be

required to pay interest on an income tax refund which is applied,

in whole or in part, to a prior year tax liability pursuant to

Oklahoma Statutes - Title 68. Revenue and Taxation Page 87

Section 2385.17 of this title or upon an income tax refund applied,

in whole or in part, to satisfy a debt owed to the Internal Revenue

Service of the United States or to a state agency, including the

Oklahoma Tax Commission, as provided by Section 205.2 of this title.

2. For tax returns filed after January 1, 2004, and before

January 2, 2010, whenever an income tax refund is not paid to the

taxpayer within the following number of days after the income tax

return is filed with all documents as required by the Tax Commission

or after the income tax return is due, whichever is later, entitling

the taxpayer to a refund, then the Tax Commission shall pay interest

on the refund at the same rate specified for interest on delinquent

tax payments:

a. for returns filed electronically, thirty (30) days,

and

b. for all other returns, one hundred fifty (150) days.

3. For tax returns filed after January 1, 2010, whenever an

income tax refund is not paid to the taxpayer within the following

number of days after the income tax return is filed or due,

whichever is later, with all documents as required by the Tax

Commission entitling the taxpayer to a refund, then the Tax

Commission shall pay interest on the refund at the same rate

specified for interest on delinquent tax payments:

a. for returns filed electronically, forty-five (45)

days, and

b. for all other returns, ninety (90) days.