First go to the schema and particular table where you want to create a custom column. Click on table and scroll down where you can find the option Create Formula Field --> Click to add the formula field and write down your formula, validate it and save it. Use this column in reports.. hope this helps.
Following up on your response. I was able to find the "Formula Builder" section in the table. Regretfully every iteration of building the attached OBIEE CASE statement has returned with an error for LIKE. Please let me know what syntax I should use to create the attached CASE statement in Incorta.
Thank you for your help,