1. On the state tab tick the rows you want (or tick Select all zipcodes in <State> to target every zip in the state). The header changes to N Zip codes selected or All Zip Codes from this state are selected.
2. Click Edit. The Bulk Edit Zip Codes window opens.
3. Fill only the fields you want to change: County, Tax (%), Modules allowed to?, Delivery Price and/or Dynamic Delivery Price rows.
4. Click Submit. A toast Zip codes updated with success! confirms.

Empty fields are left unchanged, and if you tick no module the module settings are kept. Note that the Dynamic Delivery Price rows of every selected zip are replaced by what you enter in the modal – if you leave that section empty but change any other field, existing dynamic rows on those zips are removed.