I have flat rate shipping for the store zone, Sweden. If I define a sub-zone in Sweden, the shipping estimator gives me an option to select the sub-zone under State/Province (which I must do to get the flat rate to show as an option - zone rates do not apply to the store zone).
If I delete the sub-zone, the shipping estimator does not give me the flat rate shipping option at all even for the store country.
Question: is it correct that for flat rate to work in the shipping estimator, one must both have a tax zone definition and in it a sub-zone? I can not only use a country as a "zone", without a sub-zone, even though the 'zones' shipping module is referencing the 'zone definition' (and not the sub-zone) in the dropdown?



