The photocopy pile, written down.
GSTIN checksums, HSN format, totals that close, Tally import, and when you should keep Clear or Busy instead. No labour fairy tales. No invented percentages.
Start here · GSTIN
A swapped digit still looks like a GSTIN. Recheck the checksum.
Format can pass. Mod-36 is the cheap catch before ITC. Worked example on 27AAPFU1234A1ZF, from the validator we actually ship.
GST & ITC
The invoice is in 2B. The supplier is still unpaid.
An invoice can appear in 2B while payment is still open. Build an invoice-linked review list for the 180-day ITC rule and partial settlements.
12 Oct 2026Head office is billed. The goods go to another plant.
Head office is billed while another plant receives the goods. Separate the buyer GSTIN, delivery address and place-of-supply decision in AP.
12 Oct 2026Packing and freight are on the bill. Where do they belong?
Packing and freight can sit outside the goods rows. Read the printed charges, separate the transporter bill and don't hide a difference in round-off.
12 Oct 2026The MSME payment clock starts before the payment run.
MSME payment review needs more than an invoice date. Keep supplier status, acceptance evidence and written terms beside the actual payment record.
12 Oct 2026GST is printed. That doesn't make the factory expense ITC-eligible.
GST on a factory bill is not proof of eligible credit. Build a source-backed review for canteen, building and vehicle costs without guessing from HSN.
12 Oct 2026The supplier gives a discount after you've posted the bill.
A later discount can change settlement without changing original invoice tax. Separate the supplier's credit document from AP's payment adjustment.
12 Oct 2026The GSTIN passes checksum. Is it the right supplier?
Checksum tests consistency, not supplier identity. See two synthetic passing GSTINs and learn when to check the source, vendor master and portal.
12 Oct 2026Follow ₹10 lakh as it splits three ways
Net to supplier, TDS to income tax, ITC on its own track. One payment, two taxes, zero mixing.
4 Sep 2026No GST on the freight bill. Look in the mirror.
RCM turns the tax around onto you. The annotated bill, the Tally entries, the file.
4 Sep 2026The storekeeper counted 96. The bill says 100.
Two-way checks price, three-way checks quantity. The factory habit that ends short-supply disputes.
4 Sep 2026Your supplier sent a debit note. It is not a bill.
Looks like a purchase, acts like the opposite of a credit note. The drawer it belongs in.
4 Sep 2026The invoice was perfect. The truck was still detained.
Movement paper vs money paper. What AP checks on each before filing.
4 Sep 2026The mail said e-invoice. The attachment was just a PDF.
The print is not the invoice. The two-minute IRN check before you post.
4 Sep 2026Your goods left the gate. No sale happened.
Challans out, goods back, ITC kept. Three papers, one loop, one register.
4 Sep 2026Pending in IMS: your supplier's button
Accepted, rejected, or ignored. What each does to 2B and the weekly chase that keeps it whole.
4 Sep 2026ITC has an expiry date: the 16(4) clock
Earlier of 30 November and the annual return. The October playbook that keeps the year's credit.
4 Sep 2026HSN on the invoice, not a rate table from a blog
4, 6, 8 digits. Confirm rates on CBIC. Common factory headings without pretending they are a tariff.
4 Feb 2026HSN validation: format first, directory second
2/4/6/8 digits block. Directory is a snapshot: shadow warns, live is opt-in. Empty HSN does not block today.
27 May 2026Checks before you claim ITC
What the orchestrator actually blocks vs directory shadow vs the duplicate key. Interest: read section 50, not a blog rate.
18 Mar 2026CGST/SGST vs IGST from the GSTIN state code
First two characters. Same state vs not. Arithmetic can still close on a wrong regime.
4 Mar 2026When the printed total never summed
Lines, taxable, tax, total. Default tolerance ±₹1 because that is the validator. Round-off is not a ₹50 gift.
18 Feb 2026Same invoice twice, one GSTIN a digit off
Uniqueness is invoice number plus seller GSTIN when both exist. Empty GSTIN rows are not forced unique.
8 Apr 2026GSTR-2B vs books: not always a clerk error
Supplier not filed, timing, and dirty vouchers. Clean entry only fixes the gaps you caused.
22 Apr 2026No IRN on the photocopy? The math still has to close
IRN is GSTN proof. A bad scan is not. Confidence is not a calibrated rupee risk.
13 May 2026Place of supply is not the GSTIN state code
Printed POS if we extracted it. Else buyer prefix. No geocoder. Regime still has to match.
3 Sep 2026Composition invoices: post the bill, do not claim ITC
No composition classifier. Blank tax should not become 18%. Confirm scheme on the portal.
4 Sep 2026Credit notes in the pile are not purchase vouchers
Page classing now has a credit-note label, and a note posts as a reversal. A wrong Tally type still lies in the books.
5 Sep 2026Section 16: the gate is not the statute
Checksum and math prove the document. Tax paid and 16(4) still need the Act and 2B.
8 Sep 2026GSTR-1 vs 2B vs 3B vs the books
Four piles. We file none of the GSTN ones. Dirty Tally is the pile we can clean.
9 Sep 2026Cancelled GSTIN still checksums
Status is taxpayer search. We do not call GSTN live. Do not invent a live number to export.
10 Sep 2026Invoice date vs scan date vs Tally
invoice_date is required. We do not pick FY. Day-first paper. Map the column.
11 Sep 2026Same stamp, different PAN in the GSTIN
Characters 3-12. Checksum can pass. We do not block Tally-master mismatch today.
12 Sep 2026UTGST is not SGST you can ignore
Intra bucket with CGST. Codes in gstin.py are a helper. Portal wins.
15 Sep 2026Goods and freight on one invoice
Format is digit shape. We do not rewrite chapter 72 onto a freight line.
16 Sep 2026Round-off rows: keep in sum, do not GST
plus/minus 1 rupee is a product default, not a law. Do not tax 0.40 of steel.
17 Sep 2026Challan in the bundle: not an invoice
pageclass.py votes invoice/challan/lorry/other. Credit notes not yet. Bake-off it.
18 Sep 2026RCM: blank tax columns are not zero
We do not auto-classify RCM. Missing tax goes to review. Portal and CA decide.
19 Sep 2026XML, CSV, or Excel: use what you have
We ship all three. Masters first. Do not migrate your format for a capture tool.
22 Sep 2026Map 200 vendor names once
Scan-name to Tally-ledger. Build once. Reuse every batch. We do not invent names.
23 Sep 2026Docsumo reads many documents. We prove GST photocopies.
Horizontal IDP vs GST gate. Compare on your worst scans, not a clean demo.
24 Sep 2026Zoho Books vs Tally: ledger choice, not capture
Both are ledgers. We feed Tally. Do not migrate books to fix photocopies.
25 Sep 2026Build your own OCR vs buy the gate
OCR is the demo. Validators, review, Tally mapping are the product. Six months to build.
26 Sep 2026The CA's 2B sheet is late
Clean vouchers shrink self-inflicted gaps. We do not replace the sheet.
27 Sep 2026NEEDS_REVIEW: the queue is the product
Two outcomes, not three. No "pretty sure" that still writes Tally.
28 Sep 2026The meter counts pages, not invoices
1.40 to 40K, 1.20 after. Three pages is three pages. Published on /pricing.
29 Sep 2026How straight-through is measured
Measured on your paper. Not a lab PDF. Numerator and denominator explained.
30 Sep 2026Where supplier scans are hosted
US Central server, tenant isolation and processing limits. Read /privacy.
1 Oct 2026The CA wants to see the crop
Audit trail: scan, validator log, who confirmed. Not a confidence badge.
2 Oct 2026Build for the clerk, not the CFO
Keyboard first. Evidence beside the field. No mouse tour.
3 Oct 2026When not to buy EntryLedger
No photocopy tail, not on Tally, need 2B, need on-prem, want one suite. This page should lose deals.
4 Oct 2026Ingest is not the gate
Upload live. Email and folder designed. Same gate after ingest.
5 Oct 2026Lorry receipts: not a tax invoice
pageclass votes lorry. But GSTIN + amounts may still pass the gate. Score it.
6 Oct 2026Why the tolerance is 1 rupee, not 0
Paisa round-off is normal. 50 is not. Default, not CBIC.
7 Oct 2026Factory AP stack: four jobs
Books, filing, capture, people. We are the third. Buy one layer at a time.
8 Oct 2026Buyer GSTIN required for auto-export
No buyer GSTIN, no export. Fill from master in review. Not a guess.
9 Oct 2026Tally workflow
The totals match. The quantity was read wrong.
Balanced GST totals can hide a wrong quantity. Learn to separate serial numbers, units and prices before comparing the invoice with a PO or GRN.
12 Oct 2026KGS, NOS or MTR: don't lose the unit on the way to Tally.
A printed unit, GST UQC and stock conversion are different things. Keep kilograms, metres and pieces intact before mapping a purchase invoice.
12 Oct 2026The AMOUNT column is before GST. The export expects after GST.
AMOUNT can mean before GST while TOTAL means after it. Read the column and tax summary together instead of relabelling a net figure as gross.
12 Oct 2026The GRN says received. Quality says rejected.
Receipt is not always quality acceptance. Keep rejected and quarantined quantities separate before settling a supplier invoice or requesting a credit.
12 Oct 2026Your supplier statement and Tally balance don't agree.
Your supplier's statement and ledger can disagree for different reasons. Build a document-linked reconciliation without posting unexplained amounts.
12 Oct 2026Downloaded twice doesn't mean imported twice. Or imported once.
A saved export, download and Tally import are different events. Keep the original batch identity and record the destination result before retrying.
12 Oct 2026Page two is missing. Page one still looks finished.
A clear first page does not prove a complete invoice. Check continuation pages, carried totals and attachments before treating a PDF as one entry.
12 Oct 2026Ask for the original, not another guess.
A second read can't recover a clipped tax row. Choose the original PDF, a complete rescan or clearer photo instead of confirming an unreadable field.
12 Oct 2026I confirmed a voucher I had only half read
Maker, checker, CA: three chairs, three owned sentences. The lanes that keep green fast.
4 Sep 2026Build the register your CA will hug
Column by column, with the reason each earns its place. CSV template included, free.
4 Sep 2026Scan to Tally is a gate, not a stopwatch
Upload, extract, validate, review failures, export CSV/XML. Time is paper quality. No 60-second promise.
1 Jul 2026Tally import fails on ledger names
Gateway of Tally → Import Data. Follow Tally Help for keys. Map vendors once.
17 Jun 2026Comparisons
There is no best AP software
Three questions, six picks by situation, our limits stated. Prices from their pages.
4 Sep 2026Keep Clear for filing. Gate the photocopy pile
Not a rip-and-replace. IRN is theirs. Scans without IRN are the job we sell.
5 Aug 2026Nanonets reads. It does not prove the total
Horizontal IDP is rational for many doc types. Factory GST photocopies into Tally want a binary gate.
19 Aug 2026Busy vs Tally is a ledger fight
EntryLedger is not books. If Tally stays, migrate nothing. Quotes: their pricing pages.
2 Sep 2026Data entry in India is cheap. A wrong GSTIN is not
Plug your clerks. 40,000 pages is ₹56,000 on the published meter. Do not import Western salary math.
15 Jul 2026Not a clean PDF demo. Photocopies. Watch checksum and arithmetic, not a confidence badge.