These states were listed as origin-based (c. 2017):
Arizona (AZ), California (CA), Illinois (IL), Mississippi (MS), Missouri (MO), New Mexico (NM), Ohio (OH), Pennsylvania (PA), Tennessee (TN), Texas (TX), Utah (UT), Virginia (VA).
This list may help you understand your results from TaxJar (only). (6944)
These states were listed as origin-based (c. 2017):
Arizona (AZ), California (CA), Illinois (IL), Mississippi (MS), Missouri (MO), New Mexico (NM), Ohio (OH), Pennsylvania (PA), Tennessee (TN), Texas (TX), Utah (UT), Virginia (VA).
If you live in an origin-based state, you would collect sales tax based on your location, not your customer's location. CA is an exception (state, county, and city by origin; district by destination).