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Directory Results for Includes 512, Form 512TI and Form 512TISUP 2013 Oklahoma Corporation Income Tax Forms and Instructions This packet contains: Instructions for completing the Form 512 512 corporation income tax form Form 512TI Computation of Oklahoma Consolidated to Includes 512-S and Form 512-SA 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006 2006