Hi,
Sorry for yet another english post!
I recently purchased some items (power cables for own use) from UK, where the sender sadly didn't add the EORI number to the import documents, and thus I've been charged "import charges" by UPS, since the douane can't verify it was imported under the article 23 ruling.
This means I have to book it differently than I'm used to (from article 23), but I'm a bit curious how that's done - I'm aware of the document found in Beheer -> Bijlagen -> "BTW op invoer/import", however I fail to understand what I actually fill out here

In the BTW field I expect I'd fill in 29.19 listed in the attached screenshot - since this corresponds to 21% VAT that would be applied for the items purchased (139 euro) - however, what's supposed to go in the
onderdelen factuur part?
The 13 euro (and the 2.73 euro VAT) I assume is a normal gewone factuur, since that's just an expense as anything else.
I've asked the douane if they can retrospectively apply the article 2, and refund the VAT paid that shouldn't have been paid in the first place, but I've yet to receive an answer, so I'm simply asking this question because I'm curious how the process would be if they can't!
Thanks in advance!