Once Vyapar is configured, raising a GST invoice takes under a minute. The steps below assume your GSTIN, tax rates and HSN codes are already set — if they are not, do that first, because an invoice raised on wrong tax settings has to be cancelled and reissued rather than edited. The last two steps cover the mistakes that cause invoices to be rejected at filing.
Steps
Open Sale and choose the invoice type: From the home screen select Sale, then Sale Invoice. Vyapar distinguishes a tax invoice from a bill of supply — use tax invoice for normal GST sales, and bill of supply only if you are a composition dealer or selling exempt goods.
Select or add the customer: Pick an existing party or add a new one. For a B2B sale, the customer GSTIN is mandatory and must be entered correctly — this is the single most common cause of a GSTR-1 mismatch. For B2C, name and phone number are enough.
Add items with quantity and rate: Select items from your list rather than typing free text, so the HSN code and GST rate come across automatically. If you type an item manually, you must set its HSN and tax rate on the invoice itself or the tax will be wrong.
Check the tax split: Vyapar applies CGST plus SGST for a customer in your own state and IGST for a customer outside it, based on the state on your business profile and the customer record. Glance at this on every B2B invoice — a wrong state on either record silently produces the wrong tax type.
Add discount, transport or additional charges: Apply discounts at line level or invoice level as needed. If you are adding freight or packing charges, set whether they are taxable — charges added as non-taxable when they should be taxable is a common audit finding.
Confirm the invoice number: Vyapar continues your configured series automatically. Do not overwrite it manually. GST requires an unbroken sequential series for the financial year, and a gap or duplicate invites questions at filing.
Save and share: Save the invoice, then share as PDF over WhatsApp or email, or print it. Sharing on WhatsApp is the most-used route for Indian shops and sends the customer a proper tax invoice rather than a photo of a bill book.
Record the payment: Mark the invoice paid, part-paid or unpaid. This is what keeps party balances and your receivables report accurate — skipping it is why outstanding reports drift out of line with reality within a couple of months.
Frequently Asked Questions
How do I add a customer GSTIN to a Vyapar invoice?
Enter it on the party record rather than the invoice, so it applies to every future sale to that customer. On a new party, add GSTIN at the point of creation. GSTIN is mandatory for B2B invoices and is the field most often responsible for GSTR-1 mismatches — check it against the customer's own paperwork rather than typing from memory.
Can I edit a GST invoice after saving in Vyapar?
You can edit an invoice in Vyapar, but be careful about doing so once it has been shared with the customer or included in a filed return. GST practice is to issue a credit note or revised invoice rather than silently changing an issued one. Editing before sharing and before filing is fine; editing afterwards creates a discrepancy between your books and the return.
How do I share a Vyapar invoice on WhatsApp?
Save the invoice, then use the share option and choose WhatsApp — Vyapar generates a PDF and attaches it to a message to the customer's saved number. This is the most common delivery method for Indian shops and gives the customer a proper tax invoice they can forward to their accountant.
Why is my invoice showing IGST instead of CGST and SGST?
Because Vyapar thinks the customer is in a different state from your business. Check two things: the state on your business profile, and the state on the customer record. IGST applies to inter-state supply and CGST plus SGST to intra-state, and Vyapar decides automatically from those two fields. Correct the record rather than overriding the tax on the invoice.
We supply Vyapar with INR billing and a GST invoice, plus setup and data migration. WhatsApp +91 98119 98370.