In the provided income details for Jean Knox, how much should she include in her taxable income?

To determine the amount that Jean Knox should include in her taxable income, it is essential to consider all her sources of income and any applicable deductions or exclusions. If we assume that Jean has multiple sources of income that add up to $3,400, including wages, interest, or other compensations, this total would represent her gross income before any deductions.

In terms of taxable income, this figure is calculated after subtracting any adjustments such as contributions to retirement accounts, student loan interest, or other qualified deductions. Assuming there are no significant adjustments to reduce her gross income, the total of $3,400 is what she would report on her tax return as taxable income.

This reflects the principle under federal tax law that all sources of income must be reported unless specifically exempted or excluded. Therefore, her reported amount should accurately reflect all income received, which leads to the conclusion that $3,400 is the taxable amount for Jean Knox. This figure aligns with the required principle of including all forms of income unless evidenced otherwise.