$ 900 on January 15, 2020 (4th estimated tax payment for 2019)

$1,000 on April 16, 2020 (1st estimated tax payment in 2020)

$ 1,000 on June 17, 2020 (2nd estimated tax payment in 2020)

$ 1,000 on September 16, 2020 (3rd estimated tax payment in 2020)

$ 800 on January 15, 2021 (4th estimated tax payment of 2020)

Brian had a tax overpayment of$ 500 on his 2019 state income tax return and applied this to his 2020 state income taxes. What is the amount of Brian's state income tax? itemized deduction for his 2020 Federal income tax return? explain answer