Get your taxes done using TurboTax

You can change what you enter on your W-4 with your employer so that less money is withheld from your paychecks.

https://turbotax.intuit.com/tax-tools/calculators/w4/

You said "summer job".  Are you a college student?  If you are being claimed as someone else's dependent, then anything you earn over $6300 will be taxable.

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