if I am a dependent and work a job, do I get federal and state tax refund?

you'd get your refunds if you had too much withheld

You may, if more is withheld than you tax liability.

You will if you paid in more than you owe.

Sometimes, but you don't get the stimulus check.

If you didn't make much money and aren't self-employed, then you don't owe any tax. You can file to get a refund of any tax you've paid.