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I am unclear as to what you mean by "less deductions"? Can you clarify?
Change your W-4 and claim more allowances. Keep in mind that no matter what you do with your W-4 allowances when April 15 comes around you will have to pay any tax liability that would be due as a result of not having enough withheld..
There is nothing you can do to reduce the amount being withheld for social security and medicare. Those amounts are a % of income fixed by law.
The "other" is most likely CASDI (California State Disability Insurance) also a % speicifed by law.
That being said, I have attached a link to IRS Form W-4 which has detailed instructions to assist you in determining the ideal number of allowances you should select so as to not owe a great deal in taxes nor get a large refund.
If you have any further questions on this topic please let me know.
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