It depends. You may not need to amend your return. You should keep the form in your file so that you have it if you need it. As you indicated there is no change to the tax on your return as long as you did not have any gains on the money while it was sitting in the traditional IRA. If you had any earnings in the short period it was in the IRA before it was transferred to a Roth, then those earnings would change the taxable income.
If there are earnings a Form 1040X must be completed as well as the 8606.
If there were no earnings or gains, then you should complete only the 8606 because it is a signature form and does not require a 1040X to be attached.
If you find you do need to amend your return you can use the information below. If you do the amendment you can add form 8606, even if you don't need to amend.
You will be able to access and file an amended return now (Form 1040-X).
Be sure to read all the instructions carefully, before you begin, so that TurboTax knows the original numbers and the changed numbers for your amendment.
@matheus2308
[Edited: 02/20/2024 | 8:16 AM PST]
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