We have 2 taxpayers and they both make 45,000 and have no federal income tax withheld. Tell me the approximate refund or tax due for each of these taxpayers based solely on this and the following information.

Taxpayer 1 does not have dependents and the $45,000 she made is from self employment income (Schedule C) (No expenses)

Taxpayer 2 has three children ages 4,5, and 6, and her $45,000 income is from her job at Wal-Mart.