GST Billing Guide September 2026 5 min read

How to Create GST Invoice on Mobile - Step by Step Guide

Creating a GST compliant tax invoice doesn't need expensive software or a desktop computer. With LogBook, India's free GST billing app, you can generate professional B2B and B2C tax invoices directly from your Android phone in under 2 minutes. This guide walks you through every step.

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Step 1: Download LogBook App from Google Play

Open Google Play Store on your Android phone and search for "LogBook" or "Vrox Labs LogBook". Tap Install - the app is completely free with no hidden charges. Once installed, open the app and register with your mobile number. LogBook automatically assigns you an Admin merchant account.

Step 2: Set Up Your Business Profile with GSTIN

Go to Settings and enter your business details: company name, full address, state, GSTIN number, and bank/UPI payment details. This information appears on every invoice header. LogBook auto-detects your state for correct CGST/SGST vs IGST calculation on inter-state and intra-state sales.

Step 3: Add Products with HSN Code and GST Rate

Navigate to Items tab and add your products. For each item, enter the product name, HSN/SAC code, applicable GST rate (5%, 12%, 18%, or 28%), selling price, and optionally a barcode. LogBook includes a built-in HSN Code Finder to help you look up the correct code. You can also scan product barcodes using your phone camera for faster entry.

Step 4: Create a New GST Invoice

Tap the Invoice button on the home screen. Select or add a customer (with optional GSTIN for B2B invoices). Add items from your inventory with quantity. LogBook automatically:

Assigns a sequential invoice number (e.g., INV-2026-001)
Calculates CGST + SGST for same-state sales, or IGST for inter-state sales
Shows line-item wise tax breakup with HSN codes
Computes total taxable value, tax amount, and grand total

Step 5: Share via WhatsApp or Print on Thermal Printer

Once saved, you have multiple sharing options. Tap Share PDF to send the invoice via WhatsApp, SMS, or email. If you have a Bluetooth thermal printer (58mm or 80mm), tap Print Invoice to print a professional receipt with your store logo and UPI payment QR code. The receipt prints in seconds - perfect for retail counter billing.

What Details Must a GST Invoice Contain?

As per GST law (Rule 46 of CGST Rules), every tax invoice must contain:

1. Supplier name, address, and GSTIN

2. Consecutive serial number (unique for each financial year)

3. Date of issue

4. Recipient name, address, GSTIN (for B2B)

5. HSN/SAC code for goods/services

6. Description, quantity, and unit of goods

7. Taxable value and applicable discounts

8. Rate and amount of CGST, SGST, or IGST

9. Place of supply (for inter-state)

10. Total invoice value in figures and words

LogBook automatically fills in all these fields - you just need to add items and customer details. The app handles tax calculation, sequential numbering, and GST-compliant formatting for you.

Frequently Asked Questions

Can I create GST invoice on mobile for free?

Yes. LogBook is a 100% free GST billing app that lets you create professional tax invoices on your Android phone with automatic CGST, SGST, and IGST calculation. No subscription or hidden charges.

What details are required in a GST invoice?

A GST invoice must include: Invoice number, date, seller GSTIN and address, buyer details, HSN/SAC code for each item, taxable value, CGST/SGST/IGST amounts, and total amount. LogBook fills all these automatically.

Can I print GST invoice on thermal printer from mobile?

Yes. LogBook supports direct Bluetooth printing on 58mm (2-inch) and 80mm (3-inch) ESC/POS thermal receipt printers including PeriPeri, TVS, Epson, and Rugtek models.