Download Form OW-8-P (PDF)

Oklahoma Estimated Tax Underpayment Form updated 02/2013

Printable Oklahoma Income Tax Form OW-8-P

If you failed to pay or underpaid your estimated taxes for the past tax year, you must file form OW-8-P to calculate any interest or penalties due with your income tax return. For more information, see the Oklahoma Income Tax page.

Source: http://www.tax.ok.gov/IT2012/OW-8-P.pdf