https://www.ncdor.gov/taxes-forms/other-taxes-and-fees/unaut...
From talking to folks I used to know at the Department of Revenue, they have never sold any stamps to people in advance of the cops arriving on the scene. Only to stamp collectors.
The tax rate for marijuana is $3.50 for each gram (or fraction thereof) above 42.5 grams. Bulk spirituous liquor is $12.80 per gallon.