Re: Annual?
"Currently i work for an EU based company and invoice EU reverse charge VAT. I have no clue how this will work post March 2019 and currently it seems nobody else does either."
If the UK's out of the EU by then you just follow the same procedure as for other exports outside the EU. Simply means entering the amount in a different box. (In NL it would go into section 3a rather than 3b of the VAT declaration form.)
https://www.belastingdienst.nl/wps/wcm/connect/bldcontenten/belastingdienst/business/vat/vat_in_the_netherlands/vat_relating_to_purchase_and_sale_of_goods/export_from_the_netherlands_to_non-eu_countries
Biting the hand that feeds IT
