A reduction of the income subject to tax for expenses incurred in trading or carrying on the trade or business. (source: http://en.wikipedia.org/wiki/Tax_deduction)

A reduction of the income subject to tax, for various items, especially expenses incurred to produce income. (source: http://en.wikipedia.org/wiki/Tax_deduction)

Financial expert especially trained in tax law who gives advice on tax issues and problems.

An opportunity afforded to a tax payer to rectify errors or omissions in past tax years or returns. (source: http://www.duhaime.org/LegalDictionary/T/TaxAmnesty.aspx)

An organization with official responsibility for collecting taxes. (source: http://dictionary.cambridge.org/dictionary/business-english/tax-authority)

The sum of taxable activities, collective value of real estate, and assets subject to tax within a community. (source: http://www.investorwords.com/4885/tax_base.html)

Allowable deduction on a tax return intended to reduce a taxpayer’s burden while typically supporting certain types of commercial activity. (read more: http://www.investopedia.com/terms/t/tax-benefit.asp)