How do I submit a question about the new 1099-K filing requirement to the Department of Revenue? Please fill out this form. One of our Revenue staff members will respond to your question via the email address you provide on the form. March 10, 2016 22:37 Related articles TNTAP: Filing a Sales Tax Return I work for a software vendor and have multiple clients who may need the 1099-K. Where can I find the electronic filing specifications that you require for the 1099-K? Is it possible to obtain the specifications without registering on the portal?