The 11th April 2016 BoE letter regarding this, along with a copy of the S-141 Reminders for those assigned public talks form are included in the thread below
https://www.jehovahs-witness.com/topic/5662759379271680/october-2016-campaign
The address and times would have been printed by your own congregation as per usual procedure with Memorial and Convention invites.
You can download a PDF of the invitation at:
https://www.jw.org/en/publications/books/?contentLanguageFilter=en&pubFilter=inv&sortBy=1