How to pay a fine for an overdue 3-personal income tax to an individual?

Question

Freelance

Please tell me how to pay the one-time income that was in December 2018 in February 2020? I want to get out of the shadows, so I want to pay the fine in advance.
I did the layout of a pdf document for a translation agency, but did not pay for it on time. That is, I was sent only one money transfer to Yandex.Money.
How to pay a fine? By filing 3-NDFL? Nobody faced? I do not think that this is an entrepreneurial activity, because I did not have other money transfers.

Thanks to!

Answer 1

don’t worry if there are no direct invitations and if you didn’t file personal income tax before,
if you filed - to boo, everything will count, but it seems that 1000 re will be a minimum

Answer 2

The penalty is paid only if it exists. You cannot pay the fine in advance.
Since you are a physicist, then you just need to file a declaration of income and pay tax, and this can seem to be done before April (xs what country, but in the CIS it seems to be like this everywhere).
PS I missed that it was December 2018. Then it’s not in advance)

Answer 3

What for? It's called I'm a fool and like to shoot least in the foot