I am getting the error unknown marketplace country

When you have settlements showing with an "unknown" marketplace it means that the settlements in question are ones where we can't detect the marketplace.

Amazon settlements don't actually tell us which marketplace they came from so we have to look inside the settlement report to see if there are any transactions which have the marketplace showing.

Settlements showing as "select marketplace" don't have any lines that contain the marketplace info and therefore they fail to process.

Effected settlements will show a "Select Marketplace" button instead of the marketplace name. All you need to do is:

In Amazon Seller Central you will need to switch between the different Amazon marketplaces using the marketplace selector at the top of Seller Central.

Then navigate to the Reports > Payments page.

On that page navigate to the All Statements tab.

Then look to see if the settlement amount/date showing in Link My Books is showing in the list of settlements from that marketplace.

If not then switch to another marketplace and try again. Eventually, you will find the marketplace that the settlement came from and you can then select it on the dashboard in Link My Books.

This will then allow us to process these settlements to your accounts & tax rate preferences.

If you are using our default accounts and tax rates, then you could simply choose any marketplace from the dropdown (except Amazon.co.uk).

Since these settlements do not contain any sales or refunds and instead, only fees or reserved balances, the tax treatment of them is the same regardless of the marketplace.

This will mean that the settlement will potentially show the wrong marketplace in your bookkeeping system but again, since there are no sales or refunds and only fees - this should not really matter.