Since the IRS does not allow the e-filing of income tax returns for previous years, corrected tax returns for prior years are only accepted via mail. Additional information on this topic is available in the TurboTax FAQ: Is it still possible to e-file 2017, 2016, or earlier tax returns in TurboTax? https://ttlc.intuit.com/replies/3301607
For instructions on connecting with a TurboTax Live expert, please review the FAQ: How do I connect with a tax expert in TurboTax Live? https://ttlc.intuit.com/replies/6382274
