Key takeaways
What this article covers, in order:
- The mistakes to watch for
- Step by step
- How HelloBooks helps
- Frequently asked questions
A handful of avoidable errors cause most GST notices.
The mistakes to watch for
Most problems come from mismatches, missed nil returns and wrong place-of-supply — all preventable.
- Claiming input tax credit not reflected in GSTR-2B.
- Skipping nil returns.
- Wrong place of supply, mixing up CGST/SGST and IGST.
- Mismatched figures between GSTR-1 and GSTR-3B.
Step by step
- Open the official GST portal or a free GST tool.
- Enter your details for the period or transaction.
- Review the result and keep a copy for your records.
Rates change at GST Council meetings, so always confirm the current figure for your exact HSN or SAC code on the CBIC rate finder or the GST portal before you print it on an invoice.
How HelloBooks helps
HelloBooks turns the compliance steps above into a few clicks. HelloBooks is free GST accounting software for Indian businesses: you can raise GST-compliant invoices with the correct HSN or SAC code, track input tax credit against your GSTR-2B, and file unlimited GSTR-1 and GSTR-3B returns from one dashboard.
- GST-ready invoicing with automatic CGST / SGST / IGST split and HSN or SAC codes.
- GSTR-2B reconciliation so you only claim the input tax credit you are actually entitled to.
- GSTR-1 and GSTR-3B filing free, with GSTR-9 generated ready to file and e-invoicing on higher plans.
- Due-date reminders so a late fee never catches you by surprise.
Thousands of founders, freelancers and accountants in India run their books on HelloBooks — you can start free, with no credit card.
Frequently asked questions
What is the most common GST filing mistake?
Claiming input tax credit that does not appear in GSTR-2B, followed by forgetting mandatory nil returns. Reconciling monthly prevents both.
Do I need a CA for this?
No — the process is online and self-service. A professional is optional and only needed for complex or disputed cases.
Does HelloBooks offer this for free?
Yes. HelloBooks is free GST accounting software for India: free GSTR-1 and GSTR-3B filing, GST-ready invoicing and GSTR-2B reconciliation, no credit card to start.

