Hi,
If an overseas seller is storing goods in the UK and is using a marketplace to facilitate the sales and makes a supply to a VAT registered business in the UK then the marketplace is not responsible for accounting for the VAT.
In this scenario you will provide your VAT number and the overseas company will need to charge you VAT on the sale.
Please see the following paragraph:
Online marketplace liability will not apply to business to business sales where the goods are in the UK at the point of sale. The business recipient will need to provide a valid UK VAT registration number to show that the supply is business to business sale. If this is not provided the sale should be treated as a business to consumer transaction. Where a valid VAT registration number is provided the supply will be from the overseas online marketplace seller, rather than the online marketplace, to the business recipient and will follow existing VAT rules. There will be no VAT reverse charge applied to this transaction.
Changes to VAT treatment of overseas goods sold to customers from 1 January 2021
As VAT is being charged on the sale they will have an obligation to provide you with a VAT invoice so that you can treat the VAT as your input tax:
16. VAT invoices
If you do not receive VAT invoices from overseas businesses in this scenario I would contact the businesses directly.
Thank you.