When will CA and IL state tax forms be available to download?
That information is not yet available. Normally the state programs become available from mid-December to late December.
The state forms and schedules availability dates will be shown using this TurboTax support FAQ - https://ttlc.intuit.com/community/forms/help/state-forms-availability-table-for-turbotax-individual-personal-tax-products/01/26227