Good Morning @ebailey
All files do not need to come back together. You can update the parent file and then apply across all the children files. In general, the parent file should be the one being resubmitted; however we understand that there may be practical reasons to resubmit a child file to get it to approval prior to proceeding with the rest of the children and the parent. When this is the case, please outline this for the reviewer. You may also reach out with an email to admin to confirm that the reviewers agree prior to resubmission.