@dfish2014 as of the date of this post (Oct 23, 2019) you can't do anything with any tax return on your phone. TurboTax Online for the 2018 tax filing season is shut down permanently and forever so they can prepare the system for the 2019 tax filing season. To amend your return your only option is to download and install the CD version on a Windows or MAC computer and use that to amend your return.
Also, you can't e-file an amended return. The IRS says so. You will have to print, sign (both the 1040 1040X) and mail it to the IRS. An amended return can take 6 weeks or longer to process. So before you amend make ***SURE*** you write down your AGI. You *WILL* *NEED* *IT* in order to e-file your 2019 return. If amending your 2018 return changes your AGI then it will *NOT* be updated in the IRS computers when you attempt to e-file your 2019 tax return. You'll have to manually enter the "ORIGINAL" AGi on your 2018 tax return as it was before you amended it.
