How do I file a subcontractor supplemental worksheet with a CSV file for my business taxes? You can find instructions on how to do this on our website here. April 16, 2019 14:13 Related articles How do I get an automatic F&E extension? What date does an entity formed outside of Tennessee first become subject to the franchise and excise tax? How do I apply for a refund of a tax credit on my account? How do I file business tax online?