How do i setup quickbooks to deal with VAT for five EU marketplaces?

It's good to see you here again, BigTee.

I'm here to address your VAT concern. 

You'll have to create five Cash on Hand accounts in the Chart of Accounts since QuickBooks Online (QBO) is designed to deal with one currency. Just make sure to use a VAT code for EU VAT codes when entering transactions. 

Here's how to set up an account: 

1. Click on the Gear icon and choose Chart of Accounts.
2. Select New.
3. Choose Cash at bank and in hand as the Account Type.
4. Select Cash on hand as the Detail Type.
5. Enter the name of the account. 
6. Click on Save and Close.

For more in-depth information about VAT in QBO, you can refer to this article: Common VAT Codes.

That should do it. Leave a message below if you have further questions. I'm always here to help.