DEEN
The Tax and Customs Board (EMTA), under the Ministry of Finance — spread across 58 of its own subsystems. The main ones: kmd (VAT return), tsd (payroll/social tax), impulss (workflow), mkrliides (taxpayer-register interface), tor/NCTS (customs/transit). The largest consumer is the e-invoicing platform Fitek (VAT-ID check per invoice), followed by SEB Pank. Individual subsystem meanings are inferred and flagged.
The 58 EMTA subsystems are grouped into four clusters — VAT, tax workflow & returns, customs & transit, and register interface & integration. Shares are daily averages over Dec 2025 – May 2026. Each cluster page lists the grouped subsystems.
The most-used service endpoints across all four clusters, as requests per day. The cluster pill links to the detail page.
| # | Service | Cluster | Calls / day | Avg ms |
|---|
How do the 1.22 M calls/day flow from the service clusters to the largest consumers?
Hourly distribution of calls across the day, averaged over the period.
What the aggregate data reveals about the Tax and Customs Board (EMTA).
kmd (VAT return/validation) is the single largest service at about 325,000 calls per day — Estonia's most-asked tax question.
The e-invoicing platform Fitek alone generates about 303,000 calls per day — every invoice triggers a real-time VAT-ID check. The second-largest consumer is SEB Pank.
Unlike citizen-facing registers, EMTA services run under high load at night too — tax batch jobs and customs pipelines never clock off.