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What is the invoicing schedule for Oklahoma?

Filings Received/Submitted  Invoices Issued:  SLIP+ Transaction fees due:  Oklahoma Taxes Due : 
Q1 – January 1st – March 31st  First Business Day of April   May 15th   April 30th 
Q2 – April 1st – June 30th   First Business Day of July   August 15th  July 31st  
Q3 – July 1st – September 30th  First Business Day of October  November 15th   October 31st  
Q4 – October 1st – December 31st  First Business Day of January  February 15th   January 31st