Answer:
Interests on student loans and IRA contributions are above the line deductions, which means that they decrease a person's AGI before they take any itemized or standard deduction.
Tanya's AGI before taking any deduction = $22,594 - $2,000 = $20,594
Assuming that she is filing her 2020 taxes, the standard deduction for single filers is $12,400, so her total taxable income = $20,594 - $12,400 = $8,194.