Source and process mapping
Documented trigger, required fields, roles, approvals and a clear responsibility boundary.
All DATEV products
Product 01 · Foundation
Product foundation for web invoicingTezza Web2DATEV Core
From the website order to a prepared DATEV handover – without manual double entry in the normal path.
A technical invoicing gateway for websites, portals and web apps. It receives approved business events, maps them to a consistent invoice model and exposes errors before handover.
A good fit for
A defined use case instead of a universal connector
- B2B service providers, agencies, IT and SaaS companies
- Trades, building and field-service businesses
- Consulting, training, rental and recurring services
- Websites with ordering, booking, customer portals or a custom web app
Deliverables
What you receive
REST/webhook intake
A secured, event-driven intake for the agreed website or application process.
Consistent invoice model
Normalised customer, invoice, item, payment and reference data as a stable technical foundation.
E-invoice output
Technical generation of the agreed XRechnung or ZUGFeRD format from approved source data.
Validation and duplicate controls
Format, required-field, arithmetic and duplicate checks with explicit exceptions instead of silent failures.
Target-specific handover package
A file/document export agreed with the tax adviser, including status, error log and acceptance test. RDS1 uses a separate DATEV XML route.
Process
How Web2DATEV Core works
- 1Event
An approved order, booking or invoice starts the data route.
- 2Normalisation
Source data is mapped to the agreed canonical invoice model.
- 3Technical validation
Format, required fields, arithmetic values and duplicates are checked.
- 4Handover or exception
Valid cases enter the agreed export package; open cases enter the review area.
Prerequisites
What we need to start
- One clearly scoped source system and one prioritised invoice type
- Test data without real personal data, credentials or accounting secrets
- Contacts for the website/application and tax-adviser sides
- Professionally approved required fields, tax logic and handover rules
DATEV products
Other DATEV products
DATEV RDS1 Connect
Transfer Web2DATEV documents and structured invoice data to DATEV Unternehmen online through a controlled route.
Open productTRAFFIQX E-Invoice Exchange
Send e-invoices from web processes, receive incoming invoices and trace delivery status.
Open productDATEV Integration Care
Keep the data route visible, actionable and supportable, even when a source system or interface rejects a case.
Open productProject configuration
Configure the data route from source to target
The guided intake structures source system, invoice case, target route, exception handling and responsibilities. Credentials are handled separately through the secure technical onboarding process.