If you filed a federal form 4868 extension request, you will need to attach a copy of the form to the Georgia state income tax return being filed. The state return will have to be printed and mailed for you to attach the Form 4868.
See this Georgia Department of Revenue website for information on an extension - https://dor.georgia.gov/requesting-extension
See this TurboTax support FAQ for printing the form 4868 - https://ttlc.intuit.com/questions/2879424-how-do-i-print-my-4868-extension-form-after-e-filing-it-th...
See this TurboTax support FAQ for the procedure to print a tax return for mailing using the online editions - https://ttlc.intuit.com/questions/1944348-how-do-i-print-and-mail-my-return-in-turbotax-online
