Nice to hear from you again!
We had a question about the deadlines of tax return here on Wefugees in the past. But also the other information provided there will be of interest for you too:
In general you do tax return in order to get taxes back from the state that you overpaid (Keep in mind that you only start to pay taxes if you earn more than 450€ per month). Even if it's not a lot and if it doesn't affect your future here in Germany, it can make sense for you to hand it in.