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as you already have $15,400 federal income tax withheld and want $7000 to be refunded to you - your total federal income tax obligation should be $15,400 - $7000 = ~$8,400
That means - your taxable income should be $48,000 - assuming you do not have any tax credits.
To get to this point - your deductions should be $102,317 - $48,000 - $54,317,
from which $3500 - personal exemption and $50,817 - itemized deductions
itemized deductions include
-- CA Income Tax is $5,900
-- property taxes (on your car or any other property you own)
-- medical expenses (above 7.5% of AGI)
-- charitable contribution
-- job related and some other expenses (above 2% of AGI)
From the information above you have CA Income Tax $5,900 - you need to come up with $50,817 - $5,900 = $44,917
Normally - people who itemize - use mortgage interest and real estate taxes as a largest part of itemize deduction.
There is a relatively small group of people who claim job related expenses (even some do not own the home) - that depends on the occupation.
The IRS closely watches charitable contribution deductions...
While - there is nothing wrong in taking legit deductions - that will definitely draw some attention.
You need to have a proof of deductions. See more details in the IRS Publication 526 - http://www.irs.gov/pub/irs-pdf/p526.pdf
You may also need to be familiar with the Publication 561, Determining the Value of Donated Property - http://www.irs.gov/pub/irs-pdf/p561.pdf