🔒 Your data never leaves this deviceEvery file is parsed and reconciled in your browser using JavaScript. Nothing is uploaded, stored, or transmitted to any server — there is no backend. Close the tab and it is gone.

01 · Sales register (Books)

Your books: all outward invoices, credit & debit notes for the period. Tally, SAP, Busy, Excel — any format with one row per document.

↑

Drop sales register or click

.XLSX · .XLS · .CSV

02 · GSTR-1 (as filed)

Invoice-level GSTR-1 export — the Excel from the GST offline utility, your GSP/ASP, or the portal download. One row per invoice / note.

↑

Drop GSTR-1 export or click

.XLSX · .XLS · .CSV

12 demo invoices vs GSTR-1 vs GSTR-3B — missing, mismatch, GSTIN, POS, CN/DN, short payment

03 · GSTR-3B (Table 3.1 summary)

Enter the outward-supply figures from your filed GSTR-3B. These drive the liability reconciliation.

3.1(a) Outward taxable (other than zero/nil/exempt)

Taxable value

IGST

Cess

CGST

SGST/UTGST

3.1(b) Zero-rated (exports & SEZ)

Taxable value

IGST

3.1(c) Nil-rated / exempt / non-GST

Taxable value

06 · Settings

Amount tolerance (Rs.)

Rounding below this is ignored

Date tolerance (days)

Within FY = timing only

Return period (label)

≡

Three sources, one reconciliation

Upload your sales register and GSTR-1 export, enter the GSTR-3B Table 3.1 figures, then run. Everything is computed in your browser — your taxpayer data is never uploaded.

01 Books

02 GSTR-1

03 GSTR-3B

04 Map

05 Run