How to solve "Your item's location was not filled in. The location field helps buyers determine the shipping cost(s) for the item, and should always be included."
When you're ready to begin publishing to eBay there are a few things to keep in mind prior to staging your listings for eBay. One of the most important things to be aware of is that you must be opted into eBay's new Business Policies in order to move forward with publishing.
The Location can be assigned to your entire eBay catalog but you can have different Shipping, Payment, and Return policies on each individual item. You can assign these policies within the Listings tab of your SKU.
Once you have opted in, we suggest assigning default template options within the eBay integration tile (Settings -> Integrations -> eBay -> Listing Details). One of those options is "Shipping Location"
Once this is entered then all future publish attempts will process as expected.
If you do not add a Location then you will see this error appear when you're attempting to publish:
We advise on adding the Location and republishing your item afterward.
For more tips and tricks for publishing to eBay, please review this article: