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Open the invoice entry screen, pick the customer, and either bill against a confirmed order or dispatch or key the lines directly. Item lines pull in HSN, rate and taxable value; GST is computed from your tax configuration; other charges are added; the total is rounded and spelled out in words. Save it as a tax invoice and print it. See GST Tax Invoicing.

Tax heads and rates are defined in tax configuration, then mapped by item and by party so the right rate applies automatically on each line. HSN codes and GST rates can be bulk-imported and mapped item-to-HSN-to-rate, and party GSTINs captured or imported in bulk. Once set up, you never calculate GST by hand. For a plain-English primer, see the learn hub.

A delivery challan accompanies goods and moves the material; a tax invoice bills it and carries the GST. They are deliberately distinct. Because invoicing is a financial event, not a stock event, goods leave at the challan or dispatch step and the invoice later attaches value — and a double-bill guard ties each invoice line to the dispatch so the same quantity is never billed twice. See Delivery Challan & Packing Slip.

Tax comes from your tax configuration plus item-level and party-level tax maps and the item-to-HSN-to-rate mapping. Intra-state sales split the rate into CGST plus SGST; inter-state sales apply IGST. The correct heads are applied automatically per line by item and party, and party-wise GST reports help you reconcile your returns. See GST Tax Invoicing.

Export invoices use a separate series and treatment from domestic tax invoices — GST is suppressed or handled as zero-rated under LUT as configured, and the invoice still carries item, quantity, rate, other charges and amount in words. Exporters run domestic and export series side by side in the same system, so one place covers both. See GST Tax Invoicing.

Yes. POS counter billing for quick B2C sales sits alongside full B2B tax invoicing in the same system, so a retail counter and a back-office GST invoice run on one set of items and tax rates. POS works with barcode scanners and thermal receipt printers for fast checkout, and every counter sale still carries correct GST and feeds the same registers. See Retail & POS.

Create a delivery challan or packing slip to accompany goods in transit — it lists the items and quantities being moved and supplies the data an e-way bill needs. Where billing is linked to dispatch, the challan is the source document a tax invoice is later raised against; in billing-only mode it is a standalone challan. See Delivery Challan & Packing Slip.

A credit note reduces what a customer owes. On a sales return it is often auto-generated against the dispatch it reverses, correcting the customer ledger by reversing the invoiced value. If a whole invoice must be voided instead, cancelling it releases the dispatched quantity so it can be correctly re-billed. Both post to your accounts as the matching notes. See Credit & Debit Notes.

Raise a debit note when a customer owes you more than the original invoice — for short-supply recovery, additional charges like freight, or an upward rate correction. It increases the customer's liability and posts to your accounts as a debit note. A credit note does the opposite, reducing what they owe. See Credit & Debit Notes.

Record a receipt against one or more invoices on the payment entry screen, choosing the payment mode. The receipt reduces the outstanding on those invoices and posts a receipt voucher to your accounts. Part-payments and multiple invoices in one receipt are supported, and the outstanding position updates immediately. See Payments, Receipts & Follow-up.

An on-account advance from a customer is captured as a receipt and can be applied to later invoices as they are raised — so a deposit taken up front is adjusted against future billing instead of sitting untracked. The customer's running balance always reflects advances received and invoices billed. See Payments, Receipts & Follow-up.

Outstanding and ageing views show who owes what and for how long, and payment-due reminders go out by email, SMS and WhatsApp so follow-up isn't a manual chase. You can email the invoice or statement to the customer directly, and Dhruv AI can summarise overdue receivables for you. See Payments, Receipts & Follow-up.

Voucher entry captures journal, payment and receipt entries that aren't driven by an invoice, against account heads from your chart of accounts. It's the light-accounting layer — enough to keep vouchers, expenses and account heads in order and feed your books, without replacing a full accounting suite. Your accounting tool stays the book of record. See Accounts, Vouchers & Expenses.

Supplier (vendor) bills are captured and approved against purchase orders or goods received before anything posts — approval is the control gate. Once approved, a bill posts as a purchase voucher to your accounts. It's the accounts-payable counterpart to customer invoicing, with its own report of bills and their approval status. See Accounts, Vouchers & Expenses.

Expense types are defined and mapped to account heads, with an approval step before entries hit the accounts. Budgets can be configured to check spend against plan. Statutory C-Forms issued or received against inter-state sales are tracked and reported — legacy CST support retained for older assessments. See Accounts, Vouchers & Expenses.

In project-billing mode a bill is raised against a project rather than a product — useful for construction, EPC and job-work firms. The bill carries GST and amount in words like any invoice and prints as a project bill. It's the pattern a project-based business uses instead of billing by SKU. See Project & Resource Billing.

A project bill can be built from resource lines — labour, machine and material consumed on the project — so you bill by resource rather than by finished product. Each resource line carries its rate and GST, and the bill totals up with amount in words. This is how a firm invoices the resources a project actually consumed. See Project & Resource Billing.

Yes. A project can be billed in stages against its progress or resource consumption rather than in one shot, with each bill typed and tracked against the project. That lets a construction or EPC firm raise running bills as work advances, all GST-compliant and posting to your accounts. See Project & Resource Billing.

Confirmed tax invoices post as sales vouchers with CGST/SGST/IGST ledgers, receipts as receipt vouchers, credit and debit notes as the matching notes, and approved supplier bills as purchase vouchers. Your accounting tool — Tally or another — stays the book of record while Fast Billing feeds it, so invoices are never re-keyed. See Tally Integration.

The invoice and dispatch details supply the data needed for GST returns and e-way-bill generation, and HSN and GST rates come from your item-to-HSN-to-rate map. An invoice QR (e-invoice style) is available where configured. So the same billing data that raises the invoice also feeds compliance instead of being re-entered. See GST, e-Way Bill & e-Invoice.

Dhruv AI is our AI analytics layer. It adds a billing role dashboard over live data with AI insight summaries on outstanding, overdue receivables, GST exposure and sales trends, answers plain-English questions through a safe read-only query sandbox, and clusters payment and remark notes into recurring themes. See Dhruv AI Analytics.

Access is role-based: each user sees only the menus and screens their role allows — billing clerks raise invoices, counter operators run POS, accounts staff record receipts and vouchers, and managers see the dashboards and registers. Every user's activity is logged, so the record shows who did what and when.

Yes. Every invoice, note, receipt and voucher is a document with a status history and audit trail, and every write is logged. Because invoices reference the dispatch they bill and carry the double-bill guard, you can trace exactly what was billed against what — the traceability a clean GST return and a tidy audit need.

Fast Billing runs standalone as a GST billing and light-accounts system that still posts to your accounts and Tally. It also bolts onto Fast ERP or Fast WMS to bill directly against dispatches and orders, and runs in project-billing mode against a project's bill of resources — all on one shared document engine, so adding a suite product later needs no integration project. See integrations.