Financial Report Timeline for Maintaining Current Information (FY 12/31 Filers) Fiscal Period End Date Report Type - Due Date 12/31/2015 Annual Report - 3/30/2016 Attorney Letter - 4/29/2016 3/31/2016 Quarterly Report - 5/16/2016 6/30/2016 Quarterly Report - 8/15/2016 9/30/2016 Quarterly Report - 11/14/2016 12/31/2016 Annual Report - 3/31/2017 Attorney Letter - 5/01/2017
Using these figures you would take 2 months off a 12/31 filer who reports annual 3/31 to 1/31 for a 10/31 filer.
I know it says 90 days, but holidays or something else could be tabulated differently.