June 05, 2017 16:50 Updated Follow Register and use INtax to manage your Indiana tax obligations all in one convenient place. INtax gives you immediate access to file and pay various business tax types, order coupon vouchers, register a new business and much more. Related articles I worked in Indiana six months. Then I worked six months in another state. How should I file my Indiana taxes? How do I register a new business? How do I obtain a state tax number to collect sales tax? What items are subject to sales tax and how do we report sales tax collected? Do I have to figure county tax?