Final answer:
To estimate the income tax on a $100,000 salary with $20,000 in deductions, you would calculate the taxable income by subtracting deductions, then apply the tax rates according to the relevant tax brackets.
Step-by-step explanation:
Your income tax if you made $100,000 a year with deductions of $20,000 can be determined using the provided tax rate information. As the details on how to calculate it aren't given, let's assume a simple, progressive tax rate structure similar to the United States federal income tax system for this example.
First, you would subtract your deductions from your total income to determine your taxable income. In this case, it would be $100,000 - $20,000 = $80,000. Next, you would apply the appropriate tax rates to the levels of income as specified in the tax brackets mentioned earlier (10% on income up to $9,075, 15% on the income between $9,075 and $36,900, etc.). However, the tax rate schedules provided do not exactly match the scenario in the question, so we cannot give an exact number.