For an individual, the tax year runs from 1 March until 28/29 February of the following year.
For a company, the tax year can run for any 12 month period. A company's tax year will be the same as its financial year. The company's financial year end will be reflected in its CIPC registration documents.
The tax year is different from a normal calendar year, which always runs from 1 January to end December.
The tax year is named by the year in which it ends e.g. the 2025 tax year runs from 1 March 2024 to end February 2025.