GST billing software with e-invoice and e-way bill.
Create the right GST document for every sale and keep your books ready for your accountant.
One to ManyGST
E-invoices and e-way bills from your sales.
Taxable value
₹24.6L
GST collected
₹2.94L
E-invoices
318
E-way bills
46
| Document | Type | Status |
|---|---|---|
| OF1-2627-00412 | E-invoice | Generated |
| OF1-2627-00412 | E-way bill | Valid to 2 Nov |
| OF1-2627-00409 | E-invoice | Generated |
| DC-2627-00063 | E-way bill | Valid to 1 Nov |
What is GST billing software?
GST billing software creates tax-correct bills for Indian businesses. It applies the right HSN code and GST rate, splits tax into CGST and SGST or IGST, and keeps the records you need for your returns.
In O2M, each product carries its HSN code and GST rate. When you choose a category, O2M fills both and marks them, and the rate follows the selling price for goods that pay a different rate above a price limit. A rate you type yourself is never replaced.
E-invoices and e-way bills are made through your own GST provider or the one O2M provides. O2M prepares the figures for your returns, and you or your accountant file them. Clean books reach Tally or Zoho Books without retyping.
Simple from the first day.
Step 1
Add your GSTINs
Enter your company GSTIN, and one for each warehouse if needed.
Step 2
Set HSN and rates
O2M suggests a GST rate from the HSN and price.
Step 3
Bill as usual
Tax is worked out on every bill and invoice.
Step 4
Report
Take GST reports and export your books.
What GST Billing does for you.
Correct tax on every bill
HSN codes and GST rates sit on each product.
E-invoice from the bill
Generate the IRN and print the QR on the invoice.
E-way bills
Create them from an invoice or a transfer.
Books your accountant can use
Export to Tally or sync with Zoho Books.
The right document for every sale.
Tax invoices for registered and unregistered customers, bills of supply for composition businesses, and credit and debit notes.
Sample Retail Private Limited
12, MG Road, Bengaluru, Karnataka 560001
GSTIN 29ABCDE1234F1Z5
Tax Invoice
OF1-2627-00412
30 Oct 2026
Bill to
Metro Retail
48, Residency Road, Bengaluru, Karnataka 560025
GSTIN 29AAACM1234A1Z2
Place of supply: Karnataka (29)
Payment terms: 15 days
E-way bill: 3310 2217 4056
| Item | HSN | Qty | Rate | GST | Taxable |
|---|---|---|---|---|---|
| Basmati Rice 5 kg | 1006 | 10 | 650.00 | 5% | 6,500.00 |
| Cotton Round Neck T-Shirt (M) | 6109 | 20 | 399.00 | 5% | 7,980.00 |
| LED Bulb 9 W | 8539 | 50 | 83.90 | 18% | 4,195.00 |
Amount in words: Rupees Twenty Thousand One Hundred Fifty Four Only
E-invoice
IRN a41f7c02…9c2e
Ack 1326 1000 4412
Sample Retail Private Limited
12, MG Road, Bengaluru, Karnataka 560001
GSTIN 29ABCDE1234F1Z5
Credit Note
CN-2627-00027
30 Oct 2026
Bill to
Metro Retail
48, Residency Road, Bengaluru, Karnataka 560025
GSTIN 29AAACM1234A1Z2
Against invoice: OF1-2627-00412
Reason: Goods returned
| Item | HSN | Qty | Rate | GST | Taxable |
|---|---|---|---|---|---|
| Cotton Round Neck T-Shirt (M) | 6109 | 5 | 399.00 | 5% | 1,995.00 |
This credit reduces the amount the customer owes.
Tax split
CGST and SGST when the customer is in the same state, and IGST when they are not.
Bill of supply
For sales by businesses under the composition scheme.
Invoice series
Numbers run in a series for each GSTIN and outlet.
Before you sell
A product without a GST rate shows No rate, so a tax invoice is issued only once it has one.
Make IRNs and e-way bills from your bills.
Connect your GST provider with your GSTIN and credentials, or use the one O2M provides, then choose whether business invoices get their e-invoice automatically.
One to ManySample dataGST
E-invoices and e-way bills from your sales.
Taxable value
₹24.6L
GST collected
₹2.94L
E-invoices
318
E-invoice
The IRN and acknowledgement are kept, and the invoice PDF carries the IRN and QR code.
E-way bill
See e-way bills with vehicle and validity, and change the vehicle if needed.
What still needs one
The GST portal page lists invoices that still need an e-way bill.
Transfers
Transfers between warehouses carry their challan or tax invoice, with the e-way bill number.
HSN codes and rates filled for you.
Choose a category and O2M fills the HSN code and GST rate. You can check the description of the code under the field.
One to ManySample dataGST
E-invoices and e-way bills from your sales.
Taxable value
₹24.6L
GST collected
₹2.94L
E-invoices
318
Rates that follow the price
Some goods pay a different rate above a price limit. Change the price, and an auto rate changes with it.
Your choice stays
A value you type or pick yourself is never replaced. If a price suggests another rate, the suggestion appears under the field.
Fill missing HSN codes
Products imported from a file can get their HSN codes in one go.
Channel tax codes
Sell online too? O2M sets each marketplace's tax code from the product's GST rate.
From bills to GST reports.
See GST charged and paid, and pass clean figures to your accountant.
One to ManySample dataGST
E-invoices and e-way bills from your sales.
Taxable value
₹24.6L
GST collected
₹2.94L
E-invoices
318
GSTR-1 data
Summary, HSN and document tables. Download the portal JSON and CSVs in one ZIP.
Input GST
Check it against GSTR-2B on the portal.
Several GSTINs
Separate figures and exports for each GSTIN.
Tally and Zoho Books
Export your books, or send them straight to Zoho Books.
How the tax is split.
| Sale | Tax on the invoice |
|---|---|
| Customer in the same state | CGST and SGST, half each |
| Customer in another state | IGST |
| Goods collected from the warehouse | Uses the warehouse's state |
| Customer with a GSTIN | Billed as a registered business (B2B), with the GSTIN printed |
| Customer without a GSTIN | Billed to an unregistered customer |
What your accountant gets.
| Report | Use it for |
|---|---|
| GST sales register | Every taxable sale, invoice by invoice |
| GSTR-1 summary and HSN summary | The figures for your GSTR-1 return |
| Documents issued and Credit notes | The document tables of GSTR-1 |
| Input GST (purchases) | Checking your input credit against GSTR-2B |
| Marketplace sales and TCS | Sales through marketplaces and the tax they held back |
Everything in one place.
GST documents
- Tax invoices
- Bills of supply for composition businesses
- Credit and debit notes
- Invoice series per GSTIN and outlet
E-invoice and e-way bill
- E-invoice with IRN and QR on the invoice
- E-way bill from an invoice or a transfer
- Your own GST provider or O2M's
Tax setup
- HSN with a suggested GST rate
- GST rate on each product
- Company and warehouse GSTINs
Reports and books
- GST reports
- Input GST with fee GST and debit notes
- Export to Tally
- Sync with Zoho Books
For every GST-registered business.
How to choose GST billing software
Check these before you trust software with your tax.
HSN and rate help
Rates should be suggested from the product and price, and stay under your control.
E-invoice and e-way bill
Check how the IRN and QR reach the invoice, and which GST providers are supported.
The right document
Composition businesses need a bill of supply, not a tax invoice.
GSTR-1 data
Look for a summary, HSN tables and document tables you can download.
Several GSTINs
Warehouses in other states need their own GSTIN on invoices and reports.
A clean export
Your accountant should import the books, not retype them.
GST Billing: your questions answered.
Does O2M file my GST returns?
No. O2M prepares the data, and you or your accountant file the return.
Which GST providers work with O2M?
You can connect your own GST provider or use the one O2M provides.
Can I run more than one GSTIN?
Yes. Each warehouse can have its own GSTIN, and reports and exports can follow them.
Does O2M change a GST rate by itself?
No. O2M never changes a saved GST rate by itself. It shows a suggestion when a price change needs another rate.
When is the e-invoice made?
You choose whether business invoices get their e-invoice automatically. It can also be made from the GST portal page.
Can I download GSTR-1?
Yes. Download it as the portal JSON, with the offline-tool CSVs, in one ZIP.
What about products with no GST rate?
The order can be made, but its tax invoice is issued only once the product has a rate.
Stay ready for GST with every bill.
See how O2M fits the way your business works today.