# Dhanaay > Expert articles, practical guides, and free tools for GST compliance, e-commerce growth, and business finance — built for Indian online sellers and entrepreneurs. Dhanaay is an independent publishing and tools platform for Indian e-commerce sellers, freelancers, and small business owners. All content targets Indian tax law, GST regulations, and the operational realities of selling on Amazon, Flipkart, and Meesho. Content is written by practitioners, cross-checked against CBIC circulars and GST Council notifications, and updated when rules change. ## Core Hubs - [GST Hub](https://dhanaay.com/gst): Complete GST resource centre — registration, GSTR-1, GSTR-3B, ITC, annual return, audits, and notices - [E-commerce Hub](https://dhanaay.com/ecommerce): Operational guides for marketplace sellers — cataloguing, TCS, account health, marketplace policies - [Finance Hub](https://dhanaay.com/finance): Loans, EMI planning, SIP, and financial management for business owners - [All Tools & Calculators](https://dhanaay.com/tools): 31 free calculators and reference tools — no sign-up required ## Free Calculators & Tools - [GST Calculator](https://dhanaay.com/s/gst-calculator): Add or remove GST at 5%, 12%, 18%, 28% from any amount - [GST Late Fee Calculator](https://dhanaay.com/s/gst-late-fee-calculator): Calculate GSTR-3B and GSTR-1 late fees by days delayed - [GST Registration Threshold Checker](https://dhanaay.com/s/gst-registration-threshold-checker): Check if your turnover requires GST registration - [Income Tax Calculator](https://dhanaay.com/s/tax-regime-calculator): Compare old vs new tax regime for FY 2025-26 - [Advance Tax Calculator](https://dhanaay.com/s/advance-tax-calculator): Calculate quarterly advance tax instalments - [EMI Calculator](https://dhanaay.com/s/personal-loan-calculator): Loan EMI with full amortization schedule - [Home Loan Calculator](https://dhanaay.com/s/home-loan-calculator): Home loan EMI and total interest - [Business Loan Calculator](https://dhanaay.com/s/business-loan-calculator): Business loan EMI planning - [SIP Calculator](https://dhanaay.com/s/sip-calculator): Systematic investment plan corpus and returns - [PPF Calculator](https://dhanaay.com/s/ppf-calculator): Public Provident Fund maturity with partial withdrawal - [FD Calculator](https://dhanaay.com/s/fd-calculator): Fixed deposit maturity with quarterly/monthly compounding - [Marketplace Profit Calculator](https://dhanaay.com/s/marketplace-profit-calculator): Net profit after platform fees, GST, and shipping - [TDS Rate Chart](https://dhanaay.com/s/tds-rate-chart): Section-wise TDS rates for FY 2025-26 — 194O, 194A, 194C, 194H - [GST Due Dates](https://dhanaay.com/s/gst-due-dates): Monthly GSTR-1, GSTR-3B, GSTR-9 filing calendar - [HSN Code Finder](https://dhanaay.com/hsn-finder): Search HSN and SAC codes for GST classification ## Key How-To Guides - [How to File GSTR-3B (FY 2026-27)](https://dhanaay.com/blog/how-to-file-gstr-3b-ecommerce-sellers-fy-2026-27): Complete monthly return guide — ITC reconciliation with GSTR-2B, IMS workflow, January 2026 ITC restriction, portal walkthrough - [How to File GSTR-1 (FY 2026-27)](https://dhanaay.com/blog/how-to-file-gstr-1-ecommerce-sellers-fy-2026-27): Outward supply return for marketplace sellers — B2B/B2C tables, HSN 8-digit enforcement, TCS handling, amendments - [How to Claim TDS Credit in ITR](https://dhanaay.com/blog/how-to-claim-tds-credit-itr-ecommerce-sellers): Claim Section 194O TDS deducted by Amazon, Flipkart, Meesho in ITR-3/ITR-4 for FY 2025-26 - [GST Registration Guide for E-commerce Sellers](https://dhanaay.com/blog/basic-gst-registration-guide-for-e-commerce-sellers): Step-by-step GST registration — PAN, DSC, portal enrollment, document checklist - [Section 194O TDS on E-commerce Operators](https://dhanaay.com/blog/section-194o-tds-guide-ecommerce-sellers): TDS deducted by marketplace platforms — rates, applicability, and credit claim process - [GST on E-commerce Sales — Complete Guide](https://dhanaay.com/s/gst-guide-ecommerce-sellers): GST obligations, TCS mechanism, GSTR-8, and ITC for marketplace sellers - [How to Sell Online in India — Complete Guide](https://dhanaay.com/s/sell-online-india-guide): Marketplace registration, cataloguing, pricing, and compliance for new sellers ## Content Categories - [GST Articles](https://dhanaay.com/categories/goods-and-services-tax): 60+ articles on CGST/IGST, returns, ITC, notices, and rate changes - [E-commerce Guides](https://dhanaay.com/categories/e-commerce): Amazon, Flipkart, Meesho seller operations and compliance - [Income Tax](https://dhanaay.com/categories/income-tax): ITR filing, TDS, advance tax, and tax planning for businesses - [Business Growth](https://dhanaay.com/categories/business-growth): Scaling strategy, loans, working capital, and operations - [Entrepreneurship](https://dhanaay.com/categories/entrepreneurship): Starting up, MSME registration, Udyam, and early-stage business - [All Articles](https://dhanaay.com/blog): Full archive of 160+ articles ## About - [About Dhanaay](https://dhanaay.com/about-us): Mission, editorial approach, and team - [Contact](https://dhanaay.com/getstarted): support@dhanaay.com - [FAQ](https://dhanaay.com/faq): Common questions about the platform