What is the gross income threshold for a single taxpayer under 65 to file a return?

The appropriate gross income threshold for a single taxpayer under the age of 65 to determine whether they must file a federal tax return is indeed $12,400 for the tax year 2020. This amount represents the minimum income level at which an individual must file a return.

Gross income includes all income received in the form of money, goods, property, and services that is not exempt from tax. If a taxpayer’s gross income equals or exceeds this threshold, they are required to file a return. This amount is adjusted annually for inflation, so it is important to refer to the specific year when determining filing requirements.

In this scenario, since the threshold falls under the category of single filers under the age of 65, $12,400 accurately reflects the likelihood that a person at this income level would need to file taxes, thus making it the correct choice.