Shopify has automatically set the rate for US state of Georgia's Fulton County at 3.00%. It has been 3.75% since 2017. We are undercollecting tax for Fulton County. How are these rates set in Shopify, how are they checked for accuracy, and how can they be fixed?
For those who run into a similar issue, we realized that although the county rates are incorrect, Shopify is collecting the right amount but splitting them into County + City taxes. We have to add the city tax to the county tax to get the proper amount to remit to the county.