To apply online for TNPSC Group II and IIA Services 2024, candidates have to pay the required application fee through various online payment modes like debit cards, credit cards, net banking, or UPI by the deadline. The application fee has to be paid separately for the one-time registration (OTR), preliminary examination, and main written examination. Any application form submitted without the necessary application fee will not be accepted. Candidates belonging to certain categories may be eligible for exemption from paying the examination fees as per the eligibility criteria specified in the TNPSC Group II and IIA recruitment notification.