FMTransferUpdate.com is locked until the 2nd part of the official winter patch comes out in a couple of weeks.
You need a free member account to submit edits.
Search for the players you wish to edit, either by name or filter by club.
Open the player's profile and hit the "Edit Person" button.
With our transfer wizard you can easily make the necessary changes and hit the "Submit Change for Review" once finished.
Wait for an admin to approve your submitted edits.