We had problem that started yesterday when trying to e-file from two separate (non-networked) computers:
"Customer info verified successfully, but there is an issue with your account. Please update your account information from MyATX Support Center (https://support.atxinc.com/accounts/accountmanager.aspx)
User canceled the Transmission."
Based on information on the official ATX forum, I found that you MUST have a credit card on file with ATX that can be found on that URL above.