Twitch streaming donations?

I start streaming on twitch a couple of weeks ago, and i do so three times a week now, and i wanted to set up a donation box thingy for it to pay of my car repairs ($500) how would this all work into my taxes? some places say that you dont have to file anything for this until I make like $20k or some number, but i wanted to make sure before I started this incase something bad happens.