I updated my TT 2025, clicked on "Amend a Filed Return" for my federal return. I already know it's been accepted by the IRS since last week. According to the support page, when you do that the tax refund amount is supposed to go to $0, but mine doesn't. After I added a couple of extra 1099 forms, the tax owed updated as expected but on top of the previous owed amount*. Also the forms view doesn't show the 1040-X. I think this isn't working yet.
* I e-Filed with payment to IRS on 4/1/26, not immediately.
