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Every resource founders actually use, in one library.

The essays, videos, podcasts, books and tools behind every answer across eChai's hubs, from starting up to go-to-market, D2C, founder money and AI, each with a note on why it is here.

What founders use most, ranked by how many answers lean on it.

  1. Answers the practical follow up question a founder hits right after GST: can I even take payments without one. Written by a... PhonePe Business Article · D2C Payment Gateway Without GST: Can You Accept Online Payments? PhonePe
  2. Spells out the actual cost of treating GST as optional: the penalty math under Section 122, the 18% interest clock, and the... Masters India Article · D2C Penalty for Not Registering or Late Registering Under GST Masters India
  3. A free way to sanity check any GSTIN, your own once issued, or a supplier's before you extend credit, without waiting on a CA. ClearTax Tool · D2C GST Number Search Tool - GSTIN Verification Online ClearTax
  4. Written by a payment company that onboards thousands of small sellers, so it frames GST registration around the real founder... Razorpay Learn Article · D2C GST Registration for Small Business - Minimum Turnover, New Rules & Benefits Razorpay
  5. Video · D2C GST Registration Guide for Ecommerce Sellers YouTube
  6. The clearest global explainer of economic nexus, the international equivalent of India's e-commerce mandate: the idea that... Stripe Article · D2C Introduction to US Sales Tax and Economic Nexus Stripe
  7. Shopify's own 2026 guide to US sales tax makes the same core point GST does for India: the platform will not register or remit... Shopify Article · D2C Ecommerce Sales Tax: Complete Guide for US Businesses (2026) Shopify
  8. A tax compliance vendor's FAQ that lays out registration timing cleanly: register before you start selling in a jurisdiction,... Avalara Report · D2C Sales Tax Registration FAQ Avalara
  9. If a D2C brand ever ships direct to Europe, this explains the EU's equivalent to India's threshold question: a EUR 10,000 cross... amavat Article · D2C VAT OSS Threshold Explained: What Happens After EUR 10,000 amavat
  10. A free, self-paced government training module that simulates the actual registration screens, useful if you would rather watch... GST Portal (tutorial.gst.gov.in) Course · D2C Applying for GST Registration (Computer Based Training) GSTN
  11. When your application stalls (a stuck ARN, an unresolved OTP, a portal error), this is where you raise a ticket yourself... selfservice.gstsystem.in Tool · D2C GST Self Service Grievance Redressal Portal GSTN
  12. Useful as a sanity check, not a requirement: if you decide you want paid help for one specific step, this is the government's... GST Portal (services.gst.gov.in) Tool · D2C Locate GST Practitioner (GSTP) GSTN
  13. Video · D2C GST Registration in 30 Minutes: How to Apply GST Number Under Rule 14A CA Pooja Gupta / CA Pankaj Goel (CA Guru Ji)
  14. Explains the newest fast track (effective November 2025, Notification 18/2025) that most CA firm websites have not caught up... TaxGuru Report · D2C All About New GST Registration Rule 14A: 3-Day Auto Approval TaxGuru
  15. Written for the exact reader of this question, the D2C founder about to sell on a marketplace, and confirms Amazon's own... Amazon Seller Blog (sell.amazon.in) Article · D2C Documents Required for Goods and Services Tax (GST) Registration Amazon
  16. Address proof is the single most common reason a solo application stalls; this walks through reading a REG-03 clarification... myHQ Blog Article · D2C GST Registration Rejected? Complete Fix and Reapply Guide myHQ
  17. Worth bookmarking before you start: the actual toll free number and grievance channels for when the portal itself breaks, an... ClearTax Article · D2C GST Helpline Number and Email ID ClearTax
  18. If you want the whole GST landscape in one sitting rather than piecing it together from blog posts, this is a short, current,... Amazon Kindle Book · D2C GST for Small Business and Startups: Essential Compliance and Practical Strategies for MSMEs in India Akhila S
  19. A practicing CA explaining GST and basic legal literacy for entrepreneurs in plain audio form, useful for the commute before... Apple Podcasts Podcast · D2C Tax Yatra Yashika Jain (Chartered Accountant)
  20. GST rules change often, Rule 14A itself only launched in November 2025, so subscribing keeps you from registering under a... Substack Newsletter · D2C GST News GST News
  21. The official portal's own reference tool, broken out by taxpayer category (normal taxpayer, non-resident, GST practitioner and... GST Portal (gst.gov.in) Tool · D2C GST Document Advisor: Documents Required for New Registration Application Goods and Services Tax Network (GSTN)
  22. Razorpay writes this for the same founders opening a payment gateway account right after GST registration, so the document set... Razorpay Learn Article · D2C Documents Required for GST Registration: A Checklist Razorpay
  23. One of the more complete entity-by-entity breakdowns available, useful if you are still deciding between registering as a... IndiaFilings Article · D2C GST Registration Documents Required for Businesses IndiaFilings
  24. Most D2C founders start out of a home or a relative's property rather than a formally rented office, and this is the single... ClearTax Template · D2C Consent Letter for GST Registration: Format and Requirements ClearTax

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