If you itemize deductions, you may be able to deduct your state,
local and foreign income taxes, and state and local personal
property taxes. You may also choose to deduct state and local sales
taxes instead of state and local income taxes.
Personal property taxes are deductible if the tax is imposed on
a yearly basis and is based on the assessed value of the property.
Taxes not based on the value of the property are not
State and local income taxes withheld from your wages during the
year are deductible in the year they were withheld. State and local
income tax estimates or prior year payments are also deductible in
the year you paid them.
Foreign income taxes usually qualify as an itemized deduction or
as a tax credit in the year you paid them.
You have the option of deducting state and local income taxes or
state and local sales tax. You cannot deduct both.
To claim the sales tax deduction you can either add up all sales
tax paid for the year (if you have the receipts) or you can claim a
standard amount based on your state and income level. The IRS has
provided an easy-to-use calculator to help you figure the
standard amount of deduction you are eligible to claim.
For more information please refer to IRS
Tax Topic 503 - Deductible Taxes.