4. Brad, a self-employed individual, pays state income tax payments of: $900 on January 15, 2021(4th quarter estimated tax payment for 2020) $1,000 on April 15, 2021 (1* quarter estimated tax payment for 2021) $1,500 on June 15, 2021 (2nd quarter estimated tax payment for 2021) $1,500 on September 15, 2021 (3rd quarter estimated tax payment for 2021) $2,000 on January 15, 2022 (4th quarter estimated tax payment for 2021) Brad had an overpayment of $500 from his 2020 income tax return that he filed on April 14, 2021 and applied this payment to his 2021 state estimated income taxes. What is the amount of Brad's state income tax itemized deduction for his 2021 federal income tax return? If Brad had itemized deductions of $22,000 in 2021 and received a state refund of $650 in 2022 from his 2021 state income tax return, how much if any of the $650 refund will be included in income for 2022? If Brad chooses to apply the $650 refund to his 2022 state estimated taxes (his itemized deductions were $22,000 in 2021) how much if any of the $650 refund will be taxable for federal income tax purposes