You won't be required to purchase another download. I'm not sure why the state download isn't available for you. Technically, all downloads should be available to re-download as often as you like for up to 3 years.
Please contact TurboTax Customer Support during business hours using the info linked below. A Support rep will be happy to assist you. So sorry you've had this difficulty.
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/01/25632
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*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
