I've been thinking about this more and think I may have to just wing it.

For the 6% Florida sales tax that uses that tedious bracket system, I'll set up one tax rule. How does Ubercart perform it's rounding when calculating sales anyhow? Close is better than nothing. I don't want to program my own module just to figure out these stupid taxes.

For the county discretionary surtax, I figure I'll just have another tax rule for "Florida Counties Discretionary Surtax" and charge the maximum percentage shown, which is 1.5%. Across Florida, the counties charge none, 25%, 5%, 1%, or 1.5%. So, assuming the maximum percentage would be safe, I suppose. I don't see any way through the tax rules or workflow-ng to determine a county in Florida.

What do you think?