The Indiana Department of Revenue uses an online form,4922, to verify the identity of a taxpayer. Using a quiz format, the Department of Revenue asks four personal questions, such as past addresses or months of birth. There is a three minute time limit on the quiz, states Greenwalt CPAs.
Approximately 11 percent of the Indiana tax refund dollars requested in 2014 were attempted identity theft, according to the Indiana Department of Revenue. To combat this, the agency began sending verification letters before processing some tax refund claims. If the information on the letter doesn't match the taxpayer's name or address, or if the taxpayer hasn't filed a tax return yet, he must call the Department of Revenue for assistance.