Publication 535
taxmap/pubs/p535-020.htm#en_us_publink1000208823This section discusses federal, state, local, and foreign income
taxes.
taxmap/pubs/p535-020.htm#en_us_publink1000208824You cannot deduct federal income taxes.
taxmap/pubs/p535-020.htm#en_us_publink1000208825A corporation or partnership can deduct state and local income
taxes imposed on the corporation or partnership as business expenses. An
individual can deduct state and local income taxes only as an itemized deduction
on Schedule A (Form 1040).
However, an individual can deduct a state tax on gross income
(as distinguished from net income) directly attributable to a trade or business
as a business expense.
taxmap/pubs/p535-020.htm#en_us_publink1000208826If you use an accrual method, and you contest a state or local
income tax liability, you must accrue and deduct any contested amount in the tax
year in which the liability is finally determined.
If additional state or local income taxes for a prior year are
assessed in a later year, you can deduct the taxes in the year in which they
were originally imposed (the prior year) if the tax liability is not contested.
You cannot deduct them in the year in which the liability is finally determined.
 | The filing of an income tax return is not considered a contest
and, in the absence of an overt act of protest, you can deduct the tax in the
prior year. Also, you can deduct any additional taxes in the prior year if you
do not show some affirmative evidence of denial of the liability.
|
However, if you consistently deduct additional assessments in
the year they are paid or finally determined (including those for which there
was no contest), you must continue to do so. You cannot take a deduction in the
earlier year unless you receive permission to change your method of accounting.
For more information on accounting methods, see
When Can I Deduct an Expense in chapter 1.
taxmap/pubs/p535-020.htm#en_us_publink1000208828Generally, you can take either a deduction or a credit for income
taxes imposed on you by a foreign country or a U.S. possession. However, an
individual cannot take a deduction or credit for foreign income taxes paid on
income that is exempt from U.S. tax under the foreign earned income exclusion or
the foreign housing exclusion. For information on these exclusions, see
Publication 54, Tax Guide for U.S. Citizens and Resident Aliens Abroad. For
information on the foreign tax credit, see Publication 514, Foreign Tax Credit
for Individuals.