I fear it would end up like the mess we have here in Washington state if they did something like that. We have to collect and report sales tax based on the Zip

I fear it would end up like the mess we have here in Washington state if they did something like that. We have to collect and report sales tax based on the Zip Code, and the records are updated quarterly. Their data set is something like 140,000 rows per quarter since it's fairly randomly distributed across the Zip+4 range.