I wouldn't worry too much about the "deadline" for submission, especially considering the most recent 10yr/150k adjustment. If you're like me, you've gotten more than one of these in the mail pertaining to this issue. I believe the first one I got was October 2018 stating the following..."The completed form and required documents must be presented to your dealer or received by the Reimbursement Department by September 30, 2019." My next notice was dated April 2019 with language reflecting a 6yr/72k no charge repair and the "deadline" had changed to June 30, 2020. I would rather err on the side of caution and get this reimbursement paperwork in the mail sooner than later, but I can't imagine it will have a hard cut-off date with the most recent developments, (i.e., 10yr/150K)