Hi there, welcome to Just Answer,
In order to give you a good estimate,
Can you tell me,
What type of income is the 30K (wages, self-employment earnings, etc)
How much federal tax was withheld,
What is your age and filing status,
What are the ages and identities of your dependents?
Okay, so you claimed 5 exemptions on your W4, and you have 2 dependents.
You didn't tell me how much was taken out for federal, but based on your wages I will assume approx. $1100.
Assuming that all your tips were reported accordingly,
With head of household filing status, and two dependents, after claiming 5 exemtpions (assuming fed tax withheld of $1100) your estimated federal refund would be approx.