Amazon Invoices "funded by amazon"

We have recently created an Amazon for business account and the invoices we get from them don't seem to tie from a VAT point of view due to "funded by Amazon" on the invoices. As an example, the item we purchased was £34.15 with VAT at 20% of £6.83 taking the gross amount to £40.98. Amazon have "funded" £2.48 meaning the amount we actually paid for the item was £38.50. No changes have been made to the VAT amount on the invoice which is now no longer 20% of what we paid. What is the correct treatment here? We don't want to recover too much VAT but if we adjust the VAT in Sage then we no longer have an invoice to support it that matches our figures. Thanks

Hi,
You may want to contact the marketplace to find out the VAT position here.
If the marketplace are offering you a discount on the product then please see the guidance below:
Introduction to output tax
Thank you.