I got an email from the tax office in Hungary. They are saying that although I declared my VAT owing to them on Q1 2017 as 9.65 euros, I haven't paid them.
I have, of course, via the HMRC MOSS system, which lets me pay my VAT to all the EU countries as soon as I've calculated how much is should be. I pay it all in one lump, for all 27 EU countries (UK vat is paid in a different way) to HMRC, and they are supposed to take it from there.
This is annoying. I'm also being chased by the Italian tax office; they claim that in 2015 Q1, I paid the VAT three months late. Again, I didn't. I paid via HMRC's Vat Moss. So, three years later ...
Although I do believe that staying in the EU would be best for the country, these erroneous demands for small amounts of money are starting to annoy me. Just think, from 1 March 2019, I won't have to pay VAT to EU members. Or will I? No-one knows what will happen.