You may claim a credit for excess State Disability Insurance (SDI) or Voluntary Plan Disability Insurance (VPDI) if you meet all of the following conditions:
You had two or more California employers during the tax year.
You received more than the taxable limit in gross wages from California sources.
The amounts of SDI (or VPDI) withheld appear on your Form(s) W-2. Be sure to attach your Form(s) W -2 to the lower front of your Form 540.
If SDI (or VPDI) was withheld from your wages by a single employer, at more than 0.9% of your gross wages, you may not claim excess SDI (or VPDI) on your Form 540. Contact the employer for a refund. To determine the amount to enter on line 74, complete the Excess SDI (or VPDI) Worksheet. If married/RDP filing jointly, figure the amount of excess SDI (or VPDI) separately for each spouse/RDP.