Lyndon's employer withheld $10,100 in state income taxes from Lyndon's wages in 2019. Lyndon obtained a refund of $1,700 in this year for overpayment of state income taxes for 2018. State income taxes were an itemized deduction on his 2018 return. His 2019 liability for state income tax is $8,700.

Indicate the amount of Lyndon's deduction for state income taxes on his federal tax return assuming he elects to deduct state income taxes for 2019.