Can not carry forward losses because mistakenly selected 139(4) instead of 139(1)

A taxpayer mistakenly filed their tax return under Section 139(4) (belated return) instead of Section 139(1) (original return) for AY 20-21. This error has led to a notification from the IT department stating they cannot carry forward losses. The user is seeking advice on how to rectify this mistake and still claim their losses, particularly concerning the new e-filing website's lack of a clear rectification option.