Final answer:
The Transportation Security Administration (TSA) is the least likely government agency you would encounter on your journey to deliver your taxes in person.
Step-by-step explanation:
The agency that you are least likely to have encountered on your journey is the Transportation Security Administration (TSA).
While traveling by airplane, you would come across the TSA, which is responsible for airport security and screening. However, the other three options mentioned, United States Postal Service (USPS), Internal Revenue Service (IRS), and Federal Trade Commission (FTC) are more closely related to the process of mailing and delivering taxes. USPS is responsible for handling mail and delivering mail, IRS is the federal agency responsible for collecting taxes, and FTC is responsible for protecting consumers and promoting fair trade practices.
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