The DAWSON page has helpful information, including this training video.
For assistance with DAWSON, view the FAQs and other materials here. To contact the Webmaster for technical issues or problems with the website, send an email to webmaster@ustaxcourt.gov. No documents can be filed with the Court at this email address.
For all non-technical questions, contact the Office of the Clerk of the Court at (202) 521-0700.