Explore · The library

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. Cuts through the portal's cryptic status labels so you actually know whether you're done or still exposed to suspension after... ClearTax Article · D2C All About Bank Validation Status on GST Portal ClearTax
  2. The clearest field-by-field breakdown of what Rule 46 actually requires, with the HSN-digit rule spelled out by turnover slab... Tally Solutions Article · D2C GST Invoice: Format, Types, Mandatory Fields & Examples Tally Solutions
  3. A single glance-able calendar to put your GSTR-1/GSTR-3B dates straight into your own calendar instead of hunting through... ClearTax Tool · D2C GST Calendar 2026-27: GST Due Dates, Filing Deadlines and Compliance ClearTax
  4. Video · D2C GST Returns Filing 2026: How to file GST Returns, GSTR-1, IMS & GSTR-3B YouTube
  5. The rare resource that sequences the tasks in order instead of listing rules alphabetically, so you know what to do this week... CA in Bangalore Template · D2C GST Compliance Guide for First-Time GST Registrants: Month-by-Month Checklist CA in Bangalore
  6. If you want compliant invoices and eventual e-filing from one tool rather than stitching together a billing app and a separate... Zoho Tool · D2C Zoho Books: GST Billing Software built for Indian SMEs Zoho
  7. The clean global baseline for what belongs on any invoice, useful to sanity-check your GST-specific template is not missing... Xero Article · D2C What to include on an invoice: a complete guide for small businesses Xero
  8. If your D2C brand plans to sell outside India too, this is the cleanest mental model for treating tax registration as a... Stripe Template · D2C Getting Started: Sales Tax Compliance Checklist Stripe
  9. If you bill through Shopify, this is the primary doc for where your GSTIN and tax settings actually plug into the platform,... Shopify Article · D2C Shopify Help Center: Taxes Shopify
  10. A ready-made checklist format, not just an article to read, that you can literally tick through while setting up your invoicing... A2X Template · D2C The ESSENTIAL Ecommerce Bookkeeping Checklist A2X
  11. Zooms out from the single invoice to the bookkeeping system it feeds into, so your first invoice lands in a set of books that... Shopify Article · D2C Ecommerce Bookkeeping 101 for Small Business: A Step-by-Step Guide Shopify
  12. This is Meta's own plain language explainer of the auction, the primary source for the three inputs your ad is actually judged... Meta for Business Article · D2C Facebook Ad Auctions Explained Meta for Business
  13. Once you know the auction has a bid component, this is the clearest breakdown of which bid strategy actually controls what,... Jon Loomer Digital Article · D2C Facebook Ads Bid Strategies: Lowest Cost, Cost Cap, Bid Cap Jon Loomer
  14. Video · D2C The BEST Facebook Ads Bidding Strategy Ben Heath
  15. Since creative wins the auction, this guide teaches you to actually use Meta's free public Ads Library to see what every... Foreplay Article · D2C Facebook Ads Library: The Definitive Guide Foreplay
  16. A step by step walkthrough of the Meta ad strategy behind some of the largest DTC brands, from someone who has operated and... Splitbase Podcast · D2C A Facebook Ad Strategy Used to Grow the Biggest DTC Ecommerce Brands, Explained Step by Step (with Nik Sharma) Nik Sharma
  17. A founder oriented course built by growth marketers who have run Meta campaigns across hundreds of startups, pitched at the... Demand Curve Course · D2C Meta Ads (FB + IG) Demand Curve
  18. A current, ecommerce specific conversation on how Meta's growing automation is changing what a media buyer actually spends... 7-Figures & Beyond Podcast, Stryde Podcast · D2C Ecommerce Meta Ads Trends & Insights For 2025 (Episode 53) 7-Figures & Beyond Podcast, Stryde
  19. Meta does not charge GST on its invoice to Indian advertisers, so most founders underestimate the real cost of their ad spend... Legal Suvidha Article · D2C Facebook Ads TDS & Refund Rules 2026-27 Legal Suvidha
  20. Reports the removal of the 6 percent equalisation levy on foreign digital ad platforms from April 2025, a real change to the... Business Standard Report · D2C India to scrap 6% equalisation levy on digital ads, leading to revenue loss Business Standard
  21. An independent market data report on where Indian digital ad spend is actually going, useful for benchmarking whether your own... Sensor Tower Report · D2C India State of Digital Advertising 2025 Sensor Tower
  22. It is the exact screen by screen path Meta expects you to follow, useful for cross checking against whatever a paid tutorial... Meta Business Help Center Article · D2C Set up and install the Meta Pixel Meta Business Help Center
  23. Read this before touching any settings so you understand why CAPI exists, not just how to click through it. Meta Business Help Center Article · D2C About Conversions API Meta Business Help Center
  24. This is the actual settings page language you will see inside your own Shopify admin, so it removes guesswork about which... Shopify Help Center Article · D2C Facebook data sharing Shopify Help Center

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