Hi Alexander! You will receive a notice from LTA to renew your vocational licence 1-2 months before it expires. You must meet the requirements stated in the notice in order to renew your licence. If you have misplaced the notice or did not receive it, please contact LTA at 1800 2255 582. Check this link: https://onemotoring.lta.gov.sg/content/onemotoring/home/driving/vocational_licence/vocational_licence_renewal.html for more details.