a 23 year old dependent on my mom's taxes. Should I claim 0 or 1 on my new serving job w4?

If you will turn 24 by the end of 2015, you are not a dependent if your gross income exceeds the personal exemption amount of $4,000. If that's the case, you can safely claim 1 or 2 allowances.

If you won't be 24 by the end of the year, you are a dependent as long as you don't provide more than half of your OWN support. In that case, you should claim 0 allowances.

Edit: If you turn 24 by Dec 31, 2015 and earn more than $4,000, you are NOT a dependent. Neither you nor your mother get to choose, the law determines who is a dependent and who is not.

if you are in fact a dependent, your non taxable income for 2015 is $6300, if you think you will make more than that you can access a W-4 calculator at www.irs.gov and if you complete that correctly you can probably claim single, 2, there is a chance you might owe when you file but during the year you have had the use of your own money rather than the gov using it without paying you any interest on the use of it

zero. If you report ALL of your tips, including cash tips, to your employer, and your paycheck is large enough to cover all the taxes due on both wages and tips, you can legally claim 1, but you might end up owing when you file. Claim zero to be safer.

If you're not a full time student you can't be a dependent on your mothers return. If you are a student there are income limits in order to qualify as a dependent. To be on the safe side claim 0.

Depends on how much you think you will make.