Write to david.sampson@superstack.co.za. That is the SuperStack inbox behind Taxzi. There is no separate support mailbox on the domain.
Taxzi is an estimate assistance tool, not a registered tax practitioner. You review every line. Nothing files with SARS. Taxzi does not file returns and does not speak for SARS. If a deadline is close, use eFiling or a registered tax practitioner. Filing season 2026 closes on 23 October 2026 for non-provisional individuals who were not auto-assessed, and on 22 January 2027 for provisional taxpayers.
The free calculator at /developers does not need an account and does not keep what you send. A bank-statement review does need an account, and that data stays behind login. Billing questions about a credit pack can use the same email address.
Taxzi is built by David Sampson at SuperStack Development Studio in Johannesburg. Read the about page and the privacy note before you send a statement or an identity number. Please do not email an identity number or a full bank statement unless we have asked for it on a support thread you opened.