As stated in the Support FAQ for amending a 2018 online tax return - https://ttlc.intuit.com/community/tax-topics/help/how-do-i-amend-my-2018-turbotax-online-return/01/9...
- Sign in to TurboTax.
- Scroll down to Your tax return & documents (you may need to select Show), select 2018 and then Amend (change) return.
- If you only see the option to amend 2017 or earlier, it's because you can't amend an unfiled 2018 return. Instead, just select Pick up where you left off, make your changes, and disregard the rest of these instructions.
- Select Amend using TurboTax Online.
- Carefully follow the instructions. Don't worry if your refund changes to $0. This is normal on amended returns.
If you do not see the option - Amend using TurboTax Online. Contact TurboTax support for assistance. All 2018 online tax returns can now be amended online, not with the amend software.
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
