That is California state disability insurance. It is a mandatory tax.
When entering your w-2, put your CA SDI amount in box 14 instead of box 19 (if it is in 19) so that it will be deducted as part of your state/local income taxes paid.
The max for Calif. SDI for 2013 is $100,880 wages x 1% = $1,008.80 tax. It is a hard maximum imposed by payroll laws. Please enter the cents for this amount.
