You will get a 42% discount on Parallels Desktop Pro Edition Upgrade plan through this Parallels Coupon.
How to get Parallels Coupon for Desktop Pro Edition
Click on the Click to Redeem button, you will see the Parallels Desktop for Mac landing page in a new tab. Scroll down the page or click on the BUY NOW button, and you will see Parallels all plans. Select the Upgrade plan, you will get a 42% discount on Parallels Desktop Pro Edition Upgrade plan.