TurboTax says, "If your 2019 earned income is higher than your 2021 earned income of $_____, you could get more for the Earned Income Tax Credit (EITC)" but Form 15112 makes no mention of my income. It just asks if I'm a dependent, can be claimed by another person, etc.
First that notice is GENERIC and only says you MAY be eligible for the EIC which the program calculates automatically using the info you enter in the MY INFO section and the income you entered. The IRS knows your 2019 & 2021 earned income ... they don't need that from you. The TT program asked for that info in the EIC entry section ... you may have skipped or not understood that section when you completed the interview.
The form 15112 only asks for what would normally be reported on the EIC form attached to the tax return. So instead of processing the return the IRS is giving you the chance to possibly get the credit on the originally filed return instead of making you amend the return later if you even know you need to do this. Comply with the information requested in the notice timely.