#returns

...returns, otherwise he stops the employment contract, because we go to mixed education. If I can fulfill my obligations remotely, does he have the right to do so?

I ordered a tracksuit in an online store, when I picked it up at the post office, I noticed that it was smaller in size, and I was categorically refused my request to return the money for the product. How should I act in this situation?

... tax on return?

And what taxes will I have to pay, what does it depend on?