UltraTax CS ELF Error code CSUS01

Alerts and notices
Leave feedback

Contact information (optional):

Leave this blank:

Please tell us how we can make this information more helpful.


Characters left:

MFA required for electronic filing

Effective May 3rd, the 2017 version of UltraTax CS requires multi-factor authentication (MFA) to transmit e-files from CS Connect. Find out more.

Error Code CSUS01: An invalid attachment source exists; review attachments in Edit > Electronic Filing Attachments.

The following may cause this error.

For instructions on properly attaching PDF files and file limitations, see Attaching Portable Document Format (PDF) files to electronic files.

Share This