Multiple tax groups, e.g. different taxes on different products or a different tax on shipping
Configuration :: My Store :: Show Split Tax Lines set to 'false'
... and the original order didn't include a tax, but the updated order (based, for instance, on a change in shipping location) then the newly-added ot_tax isn't added to the order.
If a store has
... and the original order didn't include a tax, but the updated order (based, for instance, on a change in shipping location) then the newly-added
ot_taxisn't added to the order.