I have several promo codes for Parallels Access. Should I redeem another code after current free subscription will be expired?
Promo code does not depend on purchase date and the free subscription starts from the date of redeeming the code. Thus you can redeem a promo code when you would like to and additional free 6 months will be added to your subscription for Parallels Access.
The instruction on how to redeem promo code you can find in this article: