See this TurboTax support FAQ for completing a prior year tax return originally started with the online editions - https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...

If you paid for the prior year Deluxe online edition or higher then you will need to contact TurboTax support so they can push the prior year installation file to your download account at no charge.

Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax