AY 2021-22 missed filing

If you've missed the filing deadline for AY 2021-22, you might be able to file an updated return (ITR-U) under section 139(8A) before the 31st March deadline. However, it appears you cannot file an ITR-U if your tax liability is nil, even if you've paid any calculated tax. This discussion seeks guidance on how to proceed with filing under these circumstances, especially with the deadline approaching.