Authors on eduki receive thir fees as royalties and not as a form of systematic and permanent employment, so it should not be a problem for teachers who work in any type of school to publish materials on our platform. However, in general we recommend that you consult an accountant or tax office to see exactly how you will declare your income.
We would love to help you more, but unfortunately we cannot provide legally binding information on tax matters. This is due to the fact that our authors come from a large number of countries and each one of them has a particular fiscal situation, which makes it impossible for us to provide a meaningful support without the risk of giving wrong indications. That is why we think it is better for you to directly ask a professional consultant or your local tax agency.
This notwithstanding, we are of course glad to provide any document you may need from our side!