MBG:
This thread actually originated in January 2019. All of these old threads transferred in 3 weeks ago when TurboTax moved the old forum to this new forum and are all unfortunately dated from that transfer date. If you find an old thread cluttered with multiple users not helpful, then it's best to start your own new thread which will concentrate on "your" situation.
Here's how to double-check that an efiled return was accepted. If you've already checked that, then just skip it. There are a lot of other people who will view this thread.
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp
Here's how to prepare a 2018 amended return, Form 1040X:
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-a-return-in-turbotax/00/27579
NOTE: If your 2018 return is due a Federal refund, you should wait on the Federal refund to arrive first before amending.
The amended return cannot be efiled. It has to be printed, signed, and mailed. It will take the IRS up to 16 weeks to process.
When mailing, it is recommended to mail by a method that has tracking, such as certified return receipt, priority mail, etc.
After 3 weeks from mailing, you can monitor the status at this IRS site:
https://www.irs.gov/filing/wheres-my-amended-return
If you amend the Federal return, you may have to amend the state return as well.
