Taxpayers need to submit a tax return to SARS so we can calculate your tax liability based on the income you declare and the tax-deductible expenses you have incurred for a year of assessment. In some cases it may result in a refund.The annual Tax Season is when you will be required to submit a return.ow do I send SARS my return. This page is also available in Afrikaans, isiZulu, Setswana, Tshivenda and Xitsonga. The Tax Season deadline of 27 November 2015 is the last day for individual taxpayers to file their return!