Tonya is a cash basis taxpayer. in 2017, she paid state income taxes of $8,000. in early 2018, she filed her 2017 state income tax return and received a $900 refund. a. if tonya itemized her deductions in 2017 on her federal income tax return, she should amend her 2017 return and reduce her itemized deductions by $900.b. if tonya itemized her deductions in 2017 on her federal income tax return and her itemized deductions exceeded the standard deduction by at least $900, the refund will not affect her 2018 tax return. c. if tonya itemized her deductions in 2017 on her federal income tax return, she must amend her 2017 federal income tax return and use the standard deduction. d. if tonya itemized her deductions in 2017 on her federal income tax return and her itemized deductions exceeded the standard deduction by more than $900, she must recognize $900 income in 2018 under the tax benefit rule. e. none of these.