Individual Income Tax
Form 511 Oklahoma Resident Income Tax Return and Sales Tax Relief Credit FormÂ
Form 511NR Oklahoma Nonresident Part-Year Income Tax ReturnÂ
Corporate Income TaxÂ
Form BT-190 Oklahoma Annual Business Activity Tax Return
Individual Income Tax
Form 511 Oklahoma Resident Income Tax Return and Sales Tax Relief Credit FormÂ
Form 511NR Oklahoma Nonresident Part-Year Income Tax ReturnÂ
Corporate Income TaxÂ
Form BT-190 Oklahoma Annual Business Activity Tax Return
