DDD Invoices plugin for Bitrix24 (How-to guide)

DDD Invoices Bitrix24 plugin enables automated creation and submission of local e-invoice XMLs to tax portals, with full error handling and invoice flow control.

The Bitrix24 plugin is available for installation via Bitrix24 Market.

What the integration does

• Sends invoices from Bitrix24 to tax authorities
• Applies correct local VAT codes and exemptions
• Generates legally compliant e-invoice XMLs
• Supports B2B and B2G e-invoicing (country-dependent)
• Tracks invoice status and errors in DDD Invoices dashboard

What you need before you start

• Bitrix24 account with CRM enabled
• Active DDD Invoices account
• DDD Invoices API / connection key
• Correct company, tax, and product data in Bitrix24

Overview of the steps needed to make your Bitrix24 invoices compliant:

1. Install the plugin in Bitrix24 Market
2. Check country-specific DDD Invoices VAT codes
3. Configure tax rates and unit measurement codes in Bitrix24
4. Prepare products, services, and company data
5. Issue and submit e-invoices from Bitrix24

1. Install the DDD Invoices plugin

• Open Bitrix24 → Market

• Search for DDD Invoices

• Install the plugin

• Enter your DDD Invoices connection key and select your country
  (from DDD Dashboard → Administration → My Company → Profile)

2. Configure VAT codes

Each invoice line must contain a valid local VAT code.

• Open an invoice in Bitrix24

• Use “Check your tax codes” inside the DDD Invoices panel

• Match Bitrix tax descriptions with DDD VAT codes
  (Slovenian example 👇)

• VAT codes must reflect:
• • Standard rates
  • Reduced rates
  • VAT exemptions (where applicable)

👉 VAT code lists are available in the DDD public API playground

3. Set tax rates & unit of measure codes

In Bitrix24 → CRM Settings:

Taxes

• Create tax rates
• Use the DDD VAT code as the tax name/description
• Assign the correct % or exemption logic

Units of measure

• Enter all measuring units you need and “connect” them to DDD Invoices UMC codes , which are visible at https://app.dddinvoices.com/public-api-playground for concerning country.

• Insert the DDD Invoices UM Code under unit symbol

4. Prepare products and services

• Assign correct VAT rate/code to all products and services
• Products must be configured before being used on invoices
• Changing VAT codes after invoice creation may cause errors

5. Required invoice data

For successful e-invoicing, the following must exist:

Seller

• Company name and address
• Country, postal code, city
• Tax number / VAT ID
• IBAN and BIC
• Additional fields for some countries (e.g. Romania, Slovenia)

Buyer

• Name and address
• Country and tax/VAT ID (if applicable)
• IBAN/BIC where required by local rules
• Additional fields for some countries

If fields are missing, contact Bitrix24 support to enable them.

6. Send the e-invoice

• After entering all invoice data, you can select select DDD Invoices payment type code

Results

• Success: Invoice is converted to XML and submitted to the tax authority

• If error: Error message is displayed with reason

All invoices (successful or failed) are visible in DDD Dashboard → Invoice Flow Control.

In case of error click on the error icon/button to check what the error is.

Need help?

If you encounter validation or tax-specific errors:

• Check the error message in DDD Dashboard
• Verify VAT codes, units ("UMC"), and required fields
• Contact [email protected] for country-specific assistance