Brian, a self emploed individual, pays state income tax payments of:

$900 on January 15, 2019 (4th estimated tax payment for 2018)

$1000 on April 16, 2019 (1st estimated tax payment in 2019)

$1000 on June 16th, 2019 (2nd estimated tax payment in 2019

$1,000 on September 16 2019 (3rd estimated tax payment in 2019)

$800 on January 15, 2020  (4th estimated tax payment of 2019)

Brian had a tax overpayment of $500 on his 2018 state income tax return and applied this to his 2019 state income taxes. What is the amount of Brian's state income tax itemized deduction for his 2019 Federal income tax return?