How to file KRA tax returns on iTax Shares If you earn an income in Kenya, the Kenya Revenue Authority (KRA) requires that you file your income tax returns by June 30 every year. Just like applying for a Personal Identification Number (PIN) on iTax, filling your returns is just as easy and should not take you more than 15 minutes. That is if you have the necessary documents. For those in employment you need a P9 form from your employer and if you are self employed you will need a profit and loss statement. For those not in gainful employment like students one also expected to file a return but it will be a nil return.