If the student is 18+ "the fields below can be entered with "N/A".

Legal Guardianship as defined in section 1 of the Education Act: Interpretation 1

(1) In this Act,… (r) “parent”, unless otherwise specified, means, in respect of a student or a child enrolled in an early childhood services program, the relevant individual referred to in subsection (2);
(2) For the purposes of subsection (1)(r), the parent is
(a) subject to subsection (3),

(i) the guardian as set out in section 20 of the Family Law Act,

(ii) the guardian appointed under Part 1, Division 5 of the Child, Youth and Family Enhancement Act, if
the guardian notifies the board in writing of the guardian’s appointment, or
(iii) the guardian appointed under section 22 or 23 of the Family Law Act, if the guardian notifies the
board in writing of the guardian’s appointment,
(b) notwithstanding clause (a), the guardian of a student appointed under a temporary or permanent guardianship order under section 31 or 34 of the Child, Youth and Family Enhancement Act, a permanent guardianship agreement under section 11 of the Child, Youth and Family Enhancement Act or a private guardianship order under section 56 of the Child, Youth and Family Enhancement Act, if the guardian notifies the board in writing of the guardian’s appointment, or
(c) notwithstanding clauses (a) and (b), the Minister of Justice and Solicitor General, if the student is in custody under the Corrections Act, the Corrections and Conditional Release Act (Canada) or the Youth Criminal
Justice Act (Canada).
(3) The authority of a guardian to act under this Act is subject to any limitation imposed by law on the authority of the guardian, and where a person claims to be a parent or guardian or claims the existence of any limitation on the authority of a parent or guardian, the onus is on that person to provide proof of the claim.
For further information, please reference the Alberta Education Act - https://kingsprinter.alberta.ca/1266.cfm?page=E00P3.cfm&leg_type=Acts&isbncln=9780779832637