Every tax invoice you raise already carries the party GSTIN, the HSN codes and the CGST/SGST/IGST split — so the data your GST returns need is captured as you bill. Fast Billing turns that into GSTR-1/2/3 reconciliation from party-wise GST data, e-way bill data from the invoice plus dispatch details, and e-invoice or QR where configured. HSN-to-GST rate maps and bulk GSTIN import keep every line correct from day one.
GST work splits two ways: the returns you file on the portal and the documents that move goods. Fast Billing feeds both from the same invoice — party-wise GST data for the return, and invoice-plus-dispatch data for the e-way bill and e-invoice — so whichever step you're on, the figures come from the bill you already raised.
Because the HSN, GST rate and GSTIN are right on the invoice, every downstream GST step starts from clean figures. There is no separate GST data-entry stage.
Every link below reads the same tax invoice and dispatch data you already capture, so the return, the transport doc and the tax on the line all agree.
Nobody wants to re-key figures into a return and hope they tie out. Because every tax invoice carries the party GSTIN, HSN and rate-wise tax, the party-wise GST data for GSTR-1 is already there — and the purchase register gives the input tax for GSTR-2 and GSTR-3 reconciliation. You check the return against the register you billed from, so a mismatch shows up before you file, not in a notice three months later.
An e-way bill and an e-invoice both need the same facts a tax invoice already holds. Because the invoice and the delivery challan are in the system, the e-way bill data — GSTINs, HSN, taxable value, distance, vehicle — comes straight from them, and where e-invoicing applies the e-invoice and its QR are produced from the same bill. The consignment leaves with the document it needs, and nothing is typed a second time.
Wrong HSN or the wrong rate is where GST trouble starts. Fast Billing maps each item to its HSN code and GST rate, and computes the tax on the line from your tax configuration and the item and party tax maps — so no one picks a rate by hand on a busy day. At go-live you import party GSTINs and the whole item-to-HSN-to-GST-rate map in bulk, so a full catalogue and customer list is GST-ready from the first invoice.
Party-wise, rate-wise outward tax with the HSN summary, pulled from your tax invoices for GSTR-1.
Input tax from the purchase register and supplier bills, reconciled so the ITC you claim matches what you recorded.
GSTINs, HSN, taxable value, distance and vehicle details drawn from the invoice plus dispatch — no re-entry.
Where e-invoicing applies, the same invoice produces the e-invoice and prints its QR on the tax invoice copy.
Each item mapped to its HSN and GST rate, with tax computed from your configuration and the item and party tax maps.
Import party GSTINs and the item-to-HSN-to-GST-rate map in bulk, so a full customer and item list is GST-ready at go-live.
In a 30-minute demo we'll raise a GST tax invoice, pull the party-wise GST for the return, fill the e-way bill from the dispatch details and print the QR — all from one document.
