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Work/ Retorna by ValioIn production since July 2026

18cross-checks per vehicle before requesting the VAT refund from the DIAN.

We automated VAT refund filings with the DIAN for electric vehicle buyers: 18 cross-checks per vehicle, official forms generated by the system, and a person who approves before anything is filed.

Client
Retorna by Valio
Industry
Electric mobility
Country
Colombia
Services
Documents and filings · AI agents
In production since
July 2026
Scope
From the buyer's file to the filing with the DIAN

Cross-checks

18

cross-checks per vehicle

Tests

1,500+

automated tests

In production

Jul. 2026

running since then

Fig. 01 — VAT refund for an electric vehicle

01The client

A filing with the DIAN for electric vehicle buyers.

Retorna by Valio handles VAT refund filings with the DIAN, Colombia's tax authority, for people who buy an electric vehicle. Each case means gathering the buyer's documents, checking them against each other, filling in the official forms and getting an appointment with the DIAN.

02The challenge

Every refund was prepared by hand, one case at a time.

Reading each buyer's documents, cross-checking them, filling in the forms and looking for a DIAN appointment: all of it was done by hand, vehicle by vehicle.

03What we built

How the process connects.

Every vehicle is a file. These are the pieces of the filing and what we built for each one.

Tap each piece to see what we built there.

  • A WhatsApp assistant looks after buyers throughout the filing.

    WhatsApp assistant

    With AI

Fig. 02 — Map of the VAT refund filing

Six parts of the system

  1. 01

    Document reading

    Reads each buyer's documents and pulls out the data for the filing.

    With AI

  2. 02

    Cross-checks

    Checks the documents against each other before anything is prepared.

    18 per vehicle

  3. 03

    Official forms

    Generates the VAT refund forms with the checked data.

    DIAN

  4. 04

    WhatsApp assistant

    Looks after buyers throughout the filing.

    WhatsApp

  5. 05

    Appointment bot

    Checks DIAN appointment availability and alerts the team.

    Automatic

  6. 06

    Automated tests

    More than 1,500 automated tests check the system.

    1,500+

04How it works

One vehicle, from documents to filing.

Rules run the cross-checks. AI reads the documents. A person approves before filing.

  1. 01BuyerThe buyer hands in their documents and the WhatsApp assistant stays with them throughout the filing.With AI
  2. 02ReadingThe system reads the documents with AI and pulls out the vehicle and buyer data.With AI
  3. 03Cross-checks18 cross-checks per vehicle, written as rules.Automatic
  4. 04FormsThe system generates the official refund forms.Automatic
  5. 05ApprovalA person reviews the complete file and approves it before filing.A person approves
  6. 06Appointment and filingThe bot flags open DIAN appointments; the team books one and files the refund.Automatic

05Results

In production since July 2026, with more than 1,500 automated tests.

Cross-checks

18

checks per vehicle before filing

Tests

1,500+

automated tests

Before

Every refund was prepared by hand, one case at a time.

After

The system reads, checks and prepares every file. A person approves before filing.

06Time and team

In production
July 2026Today

More than 1,500 automated tests.

07Technology

  • AI document reading
  • WhatsApp
  • DIAN forms
  • Automated tests
Next caseFundación Ventanas · Colombia
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