In case you have missed it you can download all your tax forms and guides from SARS' efiling website. Just click on the "Forms and Guides" link.

For your assistance:

Employers: IRP511 and guide

Companies: IT14 and guide

Trusts: IT12TR, guide, and schedule

Exempt Institutions: IT12EI, and guide

Individuals: Forms and guides

(There are also Afrikaans forms and guides available on the site)