Greg’s advice is good: take it.
Regarding how you report the income, IANAA, I seem to recall that below a certain amount, if your income is below the poverty line, or you’re a teen just starting out flipping burgers, I think you don’t have to, but you should, anyhow, since the burger outfit will file for it and you’ll get W-2’s. Among your options is to file 1040 long form with Schedule A, ( also known as slow torture method 1) and you could report it as “other income” in addition to whatever work you get W2’s for.
If you consider yourself self-employed, then you need to look up how to file the SE version of the IRS1040 for that, and beware, because Uncle expects you to estimate your total projected take for the year, in advance, then make quarterly advance payments based on that estimate. If you made less than the estimate, you’ll get a big refund. Make more than the estimate, you need to pay extra at the end of the year. But you don’t get to enjoy the money until after tax filing. Miss the quarterly payments, however, and you get big penalties.
Big. Penalties.
I once got bit that way, and mistakenly reported the extra income as “other income” when it should have been quarterly payments. Cleaning up the mess using a pro accountant and making the penalty payments with all the rest of my profits from that venture, got me out of trouble, but not making the quarterlies cost me a lot of money that I’d rather have spent on many other things. Like that Sisyphean attempt to save enough dough to get to Hawaii for a few weeks before I croak.