Practical guides on GST compliance, invoicing rules, and getting paid faster — written for Indian business owners, not accountants.
Extra work, additional materials, or a genuine undercharge discovered later — a debit note is how you bill for it without touching the original invoice, and unlike a credit note, there's no deadline pressure.
Credit & debit notesA returned product isn't just a reversed sale in your head — it needs its own credit note, referencing the original invoice, with GST reduced proportionally to what actually came back.
Credit & debit notesAn 18% item accidentally invoiced at 12%, or the reverse — the fix depends entirely on which direction the mistake went, and it's a note, never a direct edit.
Credit & debit notesA discount decided after the invoice was already issued has stricter GST conditions than one applied upfront — miss them, and the discount doesn't actually reduce your tax liability the way you'd expect.
Credit & debit notesOnce a GST invoice is issued, it's a fixed legal record — not a draft. Every correction after that point is a new document, never a change to the original.
Credit & debit notesA client who never pays doesn't entitle you to reclaim the GST you already charged — GST law has no bad-debt relief for non-payment. What you actually can do is narrower than most people assume.
Credit & debit notesA credit note is how a GST-registered business formally reduces what an invoice is worth — and there's a real deadline for it to actually reduce your tax liability, not just exist on paper.
Credit & debit notesBoth correct an already-issued invoice without editing it — a credit note lowers what's owed, a debit note raises it. The direction is the only thing that decides which one you need.
PaymentsThere are more reasons these two numbers can genuinely diverge than most small business owners expect — and knowing all of them is what stops each one from looking like an error the first time it happens.
PaymentsGST doesn't care how you were paid — but your own bank reconciliation absolutely does, and the payment method is one of the most useful fields you can record for exactly that reason.
PaymentsForm 26AS is the official record of every TDS credit against your PAN — and it should reconcile against your own books, invoice by invoice, not just match in total at year-end.
PaymentsA payment entered as the wrong amount, against the wrong invoice, or that simply never should have been recorded at all — the safe fix is never deleting the original entry.
PaymentsA client sends money before there's an invoice to apply it to — a deposit, a retainer, a booking payment. It still needs to be recorded the moment it lands, not just remembered until the invoice eventually exists.
PaymentsAn overpayment isn't an error to correct — it's real credit sitting against that client, and it should stay visible and usable, not get silently absorbed into "paid" and forgotten.
PaymentsA client paying less than the full invoice isn't a problem to work around — it's a normal event that needs to be recorded precisely, so the exact remaining balance stays visible instead of blurring into a vague "mostly paid."
PaymentsThe two TDS sections that affect most service businesses and contractors, their current rates and thresholds, and the one detail — the per-contractor annual cap — that catches people out.
PaymentsTwo completely different provisions share the initials "TDS" — one applies to almost any business paying a professional or contractor, the other only to government departments and PSUs. Confusing them is a common, avoidable mistake.
PaymentsYour client paid you exactly what they owed after deducting TDS — but your invoice still shows a balance outstanding, because most software has no way to record that the missing amount was tax, not a shortfall.
GST basicsThree dates, three different jobs — and mixing them up affects which financial year an invoice's numbering falls under and which GST return period it belongs to.
E-invoicingAn e-invoice validates the invoice itself. An e-way bill authorises goods to physically move. They're triggered by different thresholds, and having one doesn't excuse you from the other.
GST basicsThese four words get used interchangeably in conversation and mean genuinely different things under GST — and issuing the wrong one for the situation is a real compliance gap.
Invoice numberingRunning more than one invoice series is completely legal under GST — but each series has to follow the numbering rules independently, which is where most of the real mistakes happen.
E-invoicingYou can't edit an e-invoice, ever, on the portal that issued it. What you can do depends entirely on whether 24 hours have passed.
E-invoicingThere are two completely different QR code requirements under GST, for two completely different thresholds — conflating them is an easy, common mistake.
Invoice numberingGST invoice numbers don't run forever — they reset each financial year, per series, and have to be gap-free within that reset. Here's what that actually requires in practice.
E-invoicingEvery e-invoice is a GST invoice, but not every GST invoice is an e-invoice — the difference is one extra step through a government portal, and it changes what counts as legally valid.
E-invoicingAn IRN is the government's confirmation that your invoice actually exists in the national GST system — not just on your own letterhead. Here's what generates it and why it can't be typed in manually.
E-invoicingOnce your turnover crosses ₹5 crore in any year since 2017-18, e-invoicing applies permanently — even if your turnover later drops. Here's what actually triggers it.
GST complianceMost GST notices to small businesses don't trace back to fraud — they trace back to one of a handful of repeat mistakes, most of them avoidable with the right invoicing setup.
GST complianceGSTR-1 reports your invoices one by one; GSTR-3B reports your tax summary and pays it. They're meant to describe the same underlying sales — and a mismatch between them is one of the most common GST notices.
GST complianceThe composition scheme trades input tax credit and inter-state sales for a flat, low tax rate and lighter paperwork — the right call depends entirely on who your customers are.
GST complianceUnder RCM, the buyer pays the GST instead of the seller — a detail that catches small businesses off guard the first time they hire a lawyer, a transporter, or an unregistered vendor.
GST complianceA GSTIN that's expired, cancelled, or simply mistyped can silently break an otherwise-correct invoice — here's what actually happens on both sides when it does.
GST complianceThe turnover threshold for GST registration is different for goods and services, different again in special category states, and has several exceptions that override it entirely.
GST basicsA wrong HSN or SAC code is one of the quietest ways an otherwise-correct invoice becomes non-compliant. Here's how to find the right one and why the digit count depends on your turnover.
GST basicsIt isn't your customer's billing address that decides CGST+SGST versus IGST — it's the place of supply, and the two aren't always the same thing.
GST basicsA tax invoice and a bill of supply look similar but mean very different things under GST — and issuing the wrong one is a real compliance error, not a formatting choice.
GST basicsEvery field a valid GST tax invoice legally needs, in one checklist — plus the four places small businesses most often go wrong.
For freelancersWhen a freelancer actually needs to register for GST, what a compliant freelance invoice must include, and why free, unlimited invoicing matters most in the unpredictable early stretch of self-employment.
ComparisonAn honest comparison of three different approaches to GST invoicing in India — established all-in-one suites versus a newer, tax-correctness-focused tool — so you can pick based on what you actually need.
How-to guideEvery mandatory field a valid GST tax invoice needs, in the order you should fill them, plus the small mistakes — wrong HSN code, missing place of supply — that quietly make an invoice non-compliant.
Accounting basicsWhy 'how much does this customer owe me' shouldn't require adding up invoices by hand, what a proper party ledger tracks, and the quiet bookkeeping mistakes that break it.
PaymentsHow pairing a Razorpay payment link with a GST invoice speeds up collection, what automatic reconciliation actually means, and why the payment should be tied to the invoice, not just to your account.
GST basicsA plain-English breakdown of when to charge CGST+SGST versus IGST, how the split is calculated, and how to avoid the most common invoicing mistake that gets flagged in a GST audit.
GST complianceThe exact numbering requirements Rule 46(b) sets for a valid tax invoice, why a skipped or duplicate number is a real compliance risk, and how to check whether your current invoicing setup already breaks it.