Yes, you can on Yearly and Monthly Plans.
There is no refund on the Stack Lifetime Deal!
Here is our refund policy:
Stack Refund Policy
If you are not 100% satisfied with your purchase, you can request a refund. Different refund terms apply to different products and packages:
1. Stack PRO monthly subscription - you can request a refund within 7 days after your first payment for this package has been made. The refund does not apply to the payments for the second and other consecutive months of Stack PRO.
2. Stack PRO annual subscription - you can request a refund within 14 days after your first payment for this package has been made. This also applies to every consecutive payment for this package.
You do not require any sort of explanation for the reason behind requesting a refund however, we would be grateful to know as much as it helps us improve our products.