A report filed with the Internal Revenue Service (IRS) in the U.S., Her Majesty´s Revenue and customs in the U.K. or another tax agency or authority that includes a statement or inventory of goods or of properties, submitted for tax assessment.

The people who are subject to and/or liable for filing an (income) tax return, defined as taxpayers, are those who earn taxable income within a taxable year, and you are not only obliged to pay the tax but also to file a return declaring the amount of income you earned. However, not just anyone who has incomes has to file a tax return, only those who are above a certain level of income, which varies depending on your filing status, age and type of income you receive.

The gross income includes all income that you receive in the form of money, goods, property and services, not including any income that is tax-exempt. The filing status will be determined by whether the person filing the return is married or single, and depending on the family situation. If a person´s age is 65 years or older, they are allowed a higher amount of gross income than other taxpayers before they need to file a return.