I did recieve an email back in 2020 however I cannot locate it yet.  However I did the "Trade-in your Perpetual License Under Maintenance Autocad".  Is there anywere where I could find a copy of this offer for my records.  I do have my invoice, but it does not mention anything about the limits of the discounted rate.  I did the purchase with Novedge but my seller says he does not remember how long the deal is for.  Created an Autocad support ticket and they refered me to my seller.  Viscous circles.  I am just looking for offical comfirmation of my situation.  Here is the subline off my invoice:

"AutoCAD Upgrade - Trade-in your
Perpetual License Under Maintenance
AutoCAD - 1-Year Subscription -Trade-in
your Perpetual License Under
Maintenance" 

I did see the word discount on my current renewal, however I had to correct my seller who was mistakenly going to charge me quite a bit more until I called him back and he said I was right, however again, he could not tell me how long the discounted rate would last me.  Any help to confirm would be appreciated.