Nebraska requires a Nebraska Form 1065XN to be used to amend a 2023 and later Nebraska partnership returns, Form 1065N. There is no longer a box on a Nebraska partnership 1065N to click "Amended Return." Sadly, Nebraska Form 1065XN is not available in Proseries Professional. (There's a box in Proseries to check on the Nebraska return, but it does nothing.) Reviewed this with Proseries tech support. Aargh!