The document discusses various topics related to taxes, including: - The age group that represents the highest percentage of taxpayers in 2018 is 25-44 years old. Younger age groups have seen sharper increases in taxpayers from 2008-2018. - There are four requirements to determine if you must file a tax return: age, filing status, dependency status, and annual gross income. - It may be beneficial to file a tax return even if you don't meet the requirements in order to receive tax refunds from withholdings or credits you're eligible for. - The federal government will not reach out to you if you are owed a tax refund - you need to file to receive any refund.