GST & TDS Consultation for Marketplace

Hi, I'm Logesh, founder of Askobo, an Indian startup launching soon. I'm looking for a paid video consultation (about 90 minutes) with an Indian CA who knows GST and TDS rules for online marketplaces. About Askobo Askobo is an online marketplace where students (rightnow mostly CA students) learn from experts (CAs and other professionals): - Students pay to book 1:1 video sessions, group programs, webinars, courses and digital products from experts. - Coaching institutes buy prepaid credits for their students. - Students pay us online through Razorpay. We add GST and a 2.5% processing fee, keep our commission, and pay the rest to the expert after the refund period. - We also sell our own subscription plans and storage packs to experts. - A few students pay from outside India in USD. What I need clarity on 1. Who should be treated as the seller: the expert (we are only a platform earning commission) or Askobo? Today we charge 18% GST on the full price. 2. GST on invoices: buyer's state (CGST/SGST vs IGST), SAC codes, and GST on our processing fee. 3. Prepaid credits: GST at purchase or at use. 4. Expert payouts: TDS (194-O / 194J) and TCS (Section 52), commission invoices to experts, and what to collect from experts (PAN, GSTIN, KYC). 5. Foreign students paying in USD: export of services (LUT) or normal GST. 6. Which returns we must file and what reports our system should produce. I'll send a short written summary before the call so we can use the time well. After the call, a short written note of your answers would be very helpful. Could you please share: - Your price for a 60-90 minute video consultation (plus the written note) - Your available slots this week - Whether you have advised online marketplaces or e-commerce platforms on GST/TDS before Thank you!