when will updates be completed so I can amend my 2025 return?

The Form 1040X is scheduled to be available on February 26.   The date is subject to change, so check on 2-26  to see if it is ready.   Before that, do not change anything at all on your return.

ANND...you should wait until you receive your original Refund...or pay the original tax due, before you prepare and file an Amended tax return.

Your Original accepted e-filing cannot be stopped or bypassed.