| Type | Title | Year | Publisher |
|---|---|---|---|
| Sinclair ZX Spectrum cass. | 🟩 Which? Tax Calculator 1984-85 | 1985 | Consumers' Association |
| Sinclair ZX Spectrum cass. | 🟩 Which? Tax Calculator 1985-86 | 1986 | Consumers' Association |
| Sinclair ZX Spectrum cass. | 🟩 Which? Tax Calculator 1986-87 | 1987 | Consumers' Association |
| Sinclair ZX Spectrum cass. | 🟩 Which? Tax Calculator 1987-88 | 1988 | Consumers' Association |
| Sinclair ZX Spectrum cass. | 🟩 Which? Tax Calculator 1988-89 | 1989 | Consumers' Association |