Bulk Filing is a method for third party tax preparers to submit multiple clients’ returns in a single file upload. To receive Third Party/Bulk Filing Status, you must submit the Bulk Filing Application. Once approved, you will receive an “Agent” account that you can use to sign on to the MAT system. With an Agent account, and your client’s approval, you will be able to file returns and submit payments on your client’s behalf using a single login. There are two options for filing and paying returns using your MAT login. You can enter the information on the return form on each of your client’s accounts through the Third Party Return Filing Method or you can create text files, by tax type, that contain your client’s return and payment information for Bulk Uploading to the system.