Testimony April 20, 2017 by Table of Contents Testimony Description and Definition of Testimony Evidence given by a competent witness under oath. Resources See Also Further Reading Testimony in the West's Tax Law Dictionary Testimony in “A Dictionary of Taxation” Related Entries in the American Tax Encyclopedia: Witness Deposition TeleTax Ten-year Averaging Tax-Exempt Interest Taxes Taxpayer Advocate TeleFile Tenants in Common Adjustment Moving Expenses Scholarship Terminally Ill Testamentary Trust 1099-INT Standard Mileage Rate Tax Withholding Tax Year Tips Attest Tax Deductions Tax Deferral Tax Exemptions Total Tax Blind