error msg reads:
Warning: reset(); Passed variable is not an array or object i ot_tax.php on line 38

this appears on step 2 of 3 payment information

i have taxes set up as follows:
admin / locations/taxes/zone definitions: florida

admin / locations/taxes/tax classes: taxable goods

admin / locations/taxes/tax rates: priority - 1, tax class - taxable goods, zone - florida, tax rate - 6%

admin / configuration / my store:

Country United States
Zone Florida
Display Prices wtih Tax false
Display Prices with Tax in Admin false
Basis of Product tax shipping
basis of shipping tax shipping
sales tax display status 1

I tried once from a shipping address in Florida and once from a shipping address in Texas and get the same error both times. I can't figure out where I've made my mistake.
Any suggestions?