Idoc request = RD admission accepted?

not sure if its the same but i got this email

We have received a copy of the 2015 federal tax return which does not come directly to our office. Please see the snip it below taken from our website.
If you are accepted for admission, mail to IDOC (College Board’s Institutional Documentation Service) signed copies of your and your parents’ 2015 Federal Income Tax Returns, Schedules, and W-2 forms, along with any corporate and partnership returns that were submitted to the IRS. If you and/or your parent(s) are not required to file a 2015 Federal Income Tax Return, please download and complete the appropriate Non-Filer Form from the IDOC website. Non-Filer forms, along with all other tax documents, must be sent to IDOC. DO NOT SEND TAX RETURN DOCUMENTS TO OUR OFFICE. All tax returns received in our office will be shredded.
Instructions for Submitting Documents to IDOC: If you are accepted for admission, you will receive a separate email from the IDOC Service, providing instructions on how to submit 2015 federal tax forms. Mail your tax return packet directly to IDOC. If multiple schools to which you are applying participate in IDOC, you only need to submit the information to IDOC once. This information will be sent to all participating schools.
Sincerely,
Jessica Guenther
Data Coordinator
Vanderbilt University
Student Financial Aid & Undergraduate Scholarships
2309 West End Avenue
Nashville, TN 37203