13 states will join the IRS direct income tax filing pilot in 2024 - The Verge

Ditto for TN

It's becuase Texas doesn't have state income taxes so there is literally nothing extra they need to do to comply. Same goes for Florida and Tennessee, which commenters also mentioned.

Yeah...these hard right states signing on board is making me wonder if they are doing so just to shit on the program and "have a say" on how it goes.

Next year, 2024 Tax Filing Season (2023 Taxes)

https://www.irs.gov/newsroom/irs-advances-innovative-direct-file-project-for-2024-tax-season-free-irs-run-pilot-option-projected-to-be-available-for-eligible-taxpayers-in-13-states

Direct File is one more potential option from which qualifying taxpayers will be able to choose to file a 2023 federal tax return during the 2024 filing season.

Yes, 2023 taxes being filed in the "2024 filing season" as the IRS calls it.