You can only efile the Amended 1040X return from the same account you efiled the original return. If you didn't use Turbo Tax you will have to print and mail the amended return.
Ideally you should go back to who did it and they should amend it for free if it was their error. To amend a return you did somewhere else or you don't have the original.tax file, you would first have to fill out Turbo Tax like you are doing the original return and pay for it. You have to recreate the actual wrong original return. Then when it matches each line that you really filed you have to tell Turbo Tax you will mail it so it thinks it was filed. Then you can amend it.
For the current year you can use the online version by first recreating the original return exactly as filed. Then pay the fees and say to mail it and print it out so it think you filed it. Then when it matches every line you can amend. How to amend an Online return
Or you can buy the Desktop CD/Download program here, https://turbotax.intuit.com/personal-taxes/cd-download/
Short answer is NO. Go back to the CPA for the amendment.
It is possible to amend a tax return prepared elsewhere using TurboTax but it will be a real pain. It would be much easier to use the software used originally to prepare the returns than to use TurboTax.
In order to use TT software, first you have to purchase the desktop software for that year and download it to a full PC or Mac. Then you have to re-create the tax return EXACTLY as it looked when sent to the IRS. You then tell the software you will file by mail in order to "trick" the software into thinking you filed. THEN, you use that same software to prepare a Form 1040X in order to amend the return, and print, sign and mail the Form 1040X to the IRS. It takes the IRS about 3-4 months to process an amended return. It is too late to receive a refund for an amended return for any year earlier than 2017.
To file a return for a prior tax year
If you need to prepare a return for 2020, 2018, or 2019 you can purchase and download desktop software to do it, then print, sign, and mail the return(s)
Remember to prepare your state return as well—if you live in a state that has a state income tax.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return.