Key points
- Daily: correct bills, e-way bills and purchase entries.
- Monthly: GSTR-1, GSTR-2B check and GSTR-3B, on time.
- Yearly: annual return, credit time limits and records.
- ERP keeps the data clean so each step takes minutes.
- Missing dates means late fees and interest, and can affect your customers.
Every day
- Make bills with the right tax type, rate and HSN code.
- Make e-way bills for goods over ₹50,000.
- If e-invoicing applies, register B2B invoices promptly.
- Enter purchase bills as goods arrive.
- Issue credit notes for returns instead of cancelling bills.
Every week
- Check bills with missing customer GSTINs.
- Follow up suppliers whose bills haven’t been received.
- Check stock of fast movers against the shelf.
Every month
| When | What | How ERP helps |
|---|---|---|
| By the 11th | GSTR-1 (sales) | Export JSON or Excel built from bills |
| After the 14th | Check GSTR-2B and IMS | Match purchases bill by bill |
| By the 20th | GSTR-3B and payment | Summary of tax, credit and cash payable |
Small businesses in the QRMP scheme file GSTR-1 and GSTR-3B quarterly and pay tax monthly. See GST due dates.
Every year
- File the annual return (GSTR-9) by 31 December, if it applies to you.
- Claim any pending credit for the year by 30 November.
- Reverse credit for suppliers unpaid after 180 days.
- Start a new bill series in April.
- Keep records for 72 months from the annual return due date.
The costs of slipping
| Slip | What happens |
|---|---|
| Late GSTR-1 | Late fee; customers can’t see their credit |
| Late GSTR-3B | Late fee and 18% interest on tax paid late |
| No e-way bill | Goods can be detained with penalties |
| Credit not in 2B | Credit disallowed with interest |
| Returns not filed for long | Registration can be cancelled; returns older than three years can’t be filed |
How ERP keeps you on track
- Settings decide tax type and rate, so bills are right from the start.
- Return data builds as you bill.
- Reconciliation shows credit at risk.
- Reminders arrive before due dates.
- An audit trail keeps every change on record.
This post explains GST rules in simple words as we understand them on 28 Oct 2026. Rules and rates change, so please confirm with your CA or the official notifications before acting on it.