CHINH PHONG Group
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Industry Pack · Tax

Tax

From invoices and filings to structured, reconcilable, traceable tax data.

Discuss a digitization challenge

Inputs

Documents that arrive in many formats, from many systems.

  1. Generated image: a bundle of paper purchase invoices held by a clip
  2. Generated image: an open folder of business registration papers with a red stamp
  3. Generated image: a stack of inspection and audit files with string ties and index tabs
  4. Generated image: a sample paper VAT return, filled in by hand, signed and stamped, marked as sample data

  1. Input 1 of 4

    Invoices

    Electronic and scanned invoices from many issuers and formats.

  2. Input 2 of 4

    Taxpayer registration files

    Registration, change, and status records for each taxpayer.

  3. Input 3 of 4

    Inspection and audit files

    Inspection reports, decisions, and supporting evidence.

  4. Input 4 of 4

    Tax returns and filings

    Periodic returns and supporting schedules, in electronic or paper form.

Generated image: close-up of the handwritten invoice list on the sample returnGenerated image: close-up of the taxpayer name and tax code boxes, filled in by handGenerated image: close-up of the totals, one figure crossed out and corrected by handGenerated image: close-up of the signature and the red stampGenerated image: close-up of one invoice line crossed out, with a handwritten question mark beside it

Challenges

Hard problems we solve

  1. Problem 1 of 5

    Many invoice formats

    The same fields appear in different layouts and formats across issuers.

  2. Problem 2 of 5

    One record per taxpayer

    Identifiers and names vary between sources and must be linked to a single taxpayer record.

  3. Problem 3 of 5

    Reconciling invoices, returns, and books

    Differences between sources must be found and shown for an officer to review.

  4. Problem 4 of 5

    Security, permissions, and audit logs

    Taxpayer data is sensitive, so role-based access and a verifiable log are part of the requirement.

  5. Problem 5 of 5

    Evidence for every value

    Each extracted value must trace back to its source document and processing history.

Target outputs

One return, turned into data band by band.

  1. The paper return

    Handwritten, corrected, stamped

    Periodic returns and schedules, electronic or paper.

  2. Step 1 of 4

    Taxpayer records

    One record per taxpayer, linked to their returns.

  3. Step 2 of 4

    Standardized e-invoices

    Every invoice checked and put into one standard form.

  4. Step 3 of 4

    Reconciliation reports

    Matches and differences shown for officer review.

  5. Step 4 of 4

    Source evidence and processing history

    Each value links to its source document and processing history.

  6. The record

    Tax records archive

    Structured archive with role-based access and a log.

  7. Where the value lives

    One shared record: officers review only the differences, and each figure traces to its document.

Generated image: a sample paper VAT return, filled in by hand, with a crossed-out invoice line, a corrected total, a signature and a red stamp, marked as sample dataIllustration: the same return as a digital tax record: a linked taxpayer record, invoices in one standard form, a difference flagged for officer review, and an evidence and access log, marked as sample dataPaperData

Tax digitization

Watch how Chinh Phong organizes tax records, reconciles differences and traces values to their sources.

2 min 2 s, illustrative data

Chapters

Start with one representative dataset

Pick a representative set of invoices, returns, and taxpayer files. Agree on the record format, the taxpayer identifiers, the key fields, the rules for missing or conflicting values, and how the results will be accepted. Measure the results on that set before scaling up.

Discuss a digitization challenge

  1. Survey the sources

    Identify existing invoice, return, and record types with their formats and where they are kept.

  2. Standardize the records

    Agree on the record format, the taxpayer identifiers, and the checks for each field.

  3. Extract and reconcile

    Extract fields from invoices and returns, reconcile across sources, and flag differences.

  4. Accept and archive

    Measure accuracy on a checked sample set, then load into an archive with access by role.

Designed for tax records that must agree across sources and trace back to their documents. Full production starts only after the representative set is accepted.

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