Some info from SARS on WFH claims
WFH can only be claimed if a separate room is used as an office (and not a space within a room that has any another purposes)
More than 50% of your duties must have been performed in the home office and it must be specifically equipped for business
If selected for verification, the following documents are required:
1) letter from employer
2) evidence hat you worked mainly from the home office (50% rule).
3) that you worked from a dedicated home office / room (need to submit the floor plan and photos, SARS may perform a home visit);
4) need to submit a floor plan as evidence of size of home and office.
5) need to submit invoices for expenses, rental agreements for rent, bonds statements for interest etc)