The submission object returned by Tabula has the following properties:

id	A unique identifier for the submission
downloaded	A boolean value, true if the submission has been downloaded by an administrator or marker, false otherwise
submittedDate	The date and time of submission in ISO date-time format
late	A boolean value, true if the submission was late, false otherwise
authorisedLate	A boolean value, true if the submission was late within an extension, false otherwise
wordCount	The declared word count on the submission, or null if it wasn't declared or required
suspectPlagiarised	A boolean value, true if an administrator has marked the submission as suspected of plagiarism, false otherwise
attachments	An array of attachment objects for uploaded files on the submission
extension	An extension object if the student has an extension that relates to the assignment or null otherwise. From version 2020.7.17