No. It’s not income. It’s your own money back (taxes you overpaid), or money the government is giving your for free as negative tax (a special type of tax credit). This was a common misconception in 2001 - that you had to report it on your taxes. It’s no more taxable than your tax refund is.
If someone pays you less than $600 and would normally need to provide you with a 1099 for that payment, they do not need to provide a 1099 to the IRS. This doesn’t mean you don’t report it. It’s still income for you, but it saves tons of paperwork for companies that hire one-off contractors. For example, a school district in a decent sized city will have up 1000 different people officiate athletic contests or judge music competitions and collect a small check from the school. If they don’t pay someone over $600 in the course of a year, they don’t have to fill out the 1099, and they save time and money from printing up all 1000 of those (and, as a referee, I don’t want 20 1099s for $50-$200 each when I’m already keeping records).