Forms available on the fed/state web site and the electronic version built into a tax program are not ready at the same time... the electronic version must be integrated into the tax program, tested and approved by the fed/state before they can be used to efile. The testing and fed/state approvals take time which is why there is a schedule posted :
Go to this TurboTax website for forms availability - https://form-status.app.intuit.com/tax-forms-availability/formsavailability?albRedirect=true&product...
