Return U/s 139(8A)

No.You can't file .

139(8A) is applicable only if the ITR is filed under section 139(1), section 139(4), section 139(5).

If ITR was not filed then updated return 139(8A) has no relevance

In some site it is written as "In case a person has not furnished his return of income even then such person can furnish an updated return under proposed sub-section (8A) of section 139 of the Act" So A person can file under this section even if he has not filed earlier

Check once again.If there is ITR then only you can update it.You must provide the ack no etc ..But it's introduced by FA-2022.

“(8A) Any person, whether or not he has furnished a
return under sub-section (1) or sub-section (4) or sub-
section (5), for an assessment year (herein referred to as
the relevant assessment year), may furnish an updated
return of his income or the income of any other person in
respect of which he is assessable under this Act, for the
previous year relevant to such assessment year, in the
prescribed form, verified in such manner and setting forth
such particulars as may be prescribed, at any time within
twenty-four months from the end of the relevant
assessment year“

Have you tried on the portal ?

I think it is not available in portal till now

Since Finance Act: 2022 brought this amendment, you can only test it after March 2023