Hi,
You can download the supplementaray pages (SA109 - Residence) from:
Self Assessment tax return forms
The tax return can only be ordered by telephoning the orderline. The 2023 to 2024 tax return is not available on the internet.
The Self Assessment Orderline number from overseas is +44 161 930 8331 (Monday to Friday 8am to 5pm. Closed on weekends and Bank Holidays).
Thank you.