tax and also for discount codes to apply + giving some credits to a user

I hope you add features for tax and also for discount codes to apply. For customers, it will be easier to accept tax prices during purchase than to accept higher prices before purchase.

I see that the admin can give plan credits to a user. I hope you add the feature to be able to give add-on credits as well. This is important if we can give some credits to a user as a gift.