Go to "Forms" and choose your working ITR Form and click the "Manage Sections" (4 little squares).
Activate Spouse: Tick the Spouse section in the dropdown selection to be checked/activated.
Deactivate Spouse: Untick the Spouse section in the dropdown selection to be unchecked/deac.
Unlink Spouse from the Amended form
FAQ:
Q: Unlinking/removing spouse from the Amendment form.
A: First, unlink the Spouse from the Relationship section. How to "Activate" or "Deactivate" Spouse section?, Then amend the form and untick the "Spouse" from the Manage Section.