You don’t need to file your tax returns if your only source of income is your salary and if you are certain that your employer has been remitting the correct taxes to the Revenue authority.
KRA however says those earning an income other than from employment, holding more than one job, or seeking refund of taxes must file their returns.
Finance minister Uhuru Kenyatta had recommended that employers file tax returns on behalf of their workers to avoid duplication.
Read more here:
KRA Gives Direction On Tax Returns