Hi Mert Kaan GUNDOGAN,
If a business will be receiving repayments of VAT, then they may apply to change their VAT return stagger to monthly VAT returns rather than quarterly.
This can be updated in the Business Tax Account in the section “Mange Your VAT” and “Your Business Details”.
For guidance regarding selling goods located overseas via an online marketplace and how VAT is then accounted for please refer to the guidance here:
VAT and overseas goods sold to customers in the UK using online marketplaces
Thank you.