Does this split CGST and SGST?

No. It applies one GST rate to the invoice and shows it as a single line. You can note the CGST and SGST split in the notes field, but if you file GST returns regularly you will want software built for it.

Where do I put the HSN or SAC code?

In the line description — "Web development services (SAC 998314)" reads correctly on the document and keeps the code beside the item it belongs to.

Can I use this if I am not GST registered?

Yes. Remove the tax section and leave the GSTIN blank, and it becomes an ordinary bill of supply. Do not charge GST if you are not registered for it.

GST invoice format (India)

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Set up for India: rupees, GST, and a GSTIN field. No sign up, no account, nothing uploaded.

Heading Region Currency Paper

Your details

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Your name or business name

Phone

Address

Tax ID

Bill to

Client name

Client email

Client phone

Client address

Tax ID

Invoice details

Number

Issued

Terms

Due

PO number

Line items

How to pay you

Payment details

Notes

Payment link

Late payment terms

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About this document

A GST tax invoice in India carries more identifying detail than most: the GSTIN of the supplier, the GSTIN of the recipient where they are registered, the place of supply, and an HSN or SAC code for what is being sold. The heading is set to "Tax invoice", which is the wording the rules expect.

One thing to know before you rely on this: the tool applies a single GST rate to the invoice. It does not split that into CGST and SGST for an intra-state supply, or label it IGST for an inter-state one. For a straightforward invoice you can put the split in the notes; for regular filing, dedicated Indian GST software will serve you better.

What an Indian GST invoice needs

The heading "Tax invoice" and a unique serial number
Date of issue
Your name, address and GSTIN
The recipient's name, address and GSTIN where registered
Place of supply, and the state code
HSN code for goods or SAC code for services
Taxable value, the rate, and the tax amount

This is general information, not tax or legal advice. Requirements differ by jurisdiction and by the kind of work you do — check with your own accountant or tax authority if anything is unclear.

Questions

Does this split CGST and SGST?: No. It applies one GST rate to the invoice and shows it as a single line. You can note the CGST and SGST split in the notes field, but if you file GST returns regularly you will want software built for it.
Where do I put the HSN or SAC code?: In the line description — "Web development services (SAC 998314)" reads correctly on the document and keeps the code beside the item it belongs to.
Can I use this if I am not GST registered?: Yes. Remove the tax section and leave the GSTIN blank, and it becomes an ordinary bill of supply. Do not charge GST if you are not registered for it.