Here’s the introduction to their piece

Significant challenges are likely on the way for California marijuana businesses this year.

Even with all the upheaval of the past two years, ongoing shifts in the market involving tax increases, 280E and the potentials surrounding exporting cannabis from state to state might mean even more added costs for cannabis businesses in California.

The California Department of Tax and Fee Administration, which is responsible for overseeing cannabis tax rates and collection,
 announced in November that taxes were going up at the start of 2020. Yet another tax hike?

Full story at

California Marijuana Notebook: Tax issues loom high on the agenda for state’s cannabis industry