Oklahoma requires businesses with employees to register for a withholding tax account. Here is a link to the online registration process:
- Select the "Enter the Online Business Registration System. (click here)" link toward the bottom of the page.
- Have the business EIN handy
- Lookup your business Filing Number and Date here: https://www.sos.ok.gov/corp/corpInquiryFind.aspx
- It's easiest to search the business records using your business name but you can also use the "Advanced Search" option and search using parameters such as "Search by Name of Person"
- Lookup your business type's NAICS code here: https://www.naics.com/search/