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Estoniae-MTA

EMTA publishes AES X-tee interface v1.6 with new export validation rules

Export declarants filing via the X-tee machine interface face new checks on additional information, previous documents, goods location and routing, with production testing expected in the second half of November 2026.

By Taxxa AI OyPublished 29 September 2026

Tax

Estonian export declarants and their software vendors must prepare for a new version of the machine-to-machine interface of the Automated Export System (AES). The Tax and Customs Board (Maksu- ja Tolliamet) published version 1.6 of the AES X-tee liides on its technical information page on 29 September 2026Emta.Emta The specification itself is dated 30 September 2026 and states that production testing (tootestamine) of the changes is expected in the second half of November 2026, with the exact date to be confirmed by e-mail.

The package contains an updated interface specification, revised message composition tables for the office of export and the office of exit, and an updated rule table. The most consequential additions are new national validation rules that export declarations must pass before acceptanceEmta Emta.

For export declarations, procedure-31 consignments face stricter checks on previous documents: where the goods procedure is 31, the declaration must carry an NMRN previous documentEmta, and where that document cannot be submitted in the system, the information must instead be entered under additional information code E002Emta. Previous documents not permitted for the declaration type in question — export declaration, exit summary declaration (väljumise ülddeklaratsioon, VÜD) or re-export notification — are rejected.Emta Exit summary declarations must always carry a previous document unless additional information shows that no previous document can exist.Emta

Additional information code 30500 is restricted: it must not be added at item levelEmta, and it cannot be used at all with procedure 31 or for excise goodsEmta. Additional information codes 70800, E001 and E002 must carry a description.Emta Re-export notifications face new constraints: the goods location must not be stated as the customs officeEmta, and the destination country information must be given with additional information code EL or non-ELEmta.

Goods location rules are tightened for authorised locations. For EX declarations with procedure 3171, a goods location stated as a place designated by authorisation — the customs warehouse number — must match the warehouse identifier (Lao tunnus). A re-export declaration with procedure 31 that states such an authorised location cannot use a temporary storage (TST) authorisation.Emta For exit summary declarations with an authorised location, only a temporary storage place (TST) or a free zone (Z0) is permitted.Emta

Routing data become mandatory in more cases: the countries traversed on the route must number at least twoEmta. The consignee conditions C0222 and C0853 were amended in connection with additional information code 30600.Emta

Licence and certificate handling is extended. Four new Stratlink licence rules apply: an item must not carry several Stratlink supporting documents with the same reference numberEmta, nor several Stratlink supporting documents of the same typeEmta; where the written-off quantity uses the NAR measurement unit qualifier, only whole numbers are allowedEmta; and Stratlink is consulted only where the reference number matches the Stratlink structureEmta. Fluorinated greenhouse gas (FGAS) certificate reference numbers may contain digits only.Emta The exit-office message tables drop rule ISIK_14 from message CC547C.

One new warning, W0005,Emta fires where the sum of statistical values and the total invoice amount in euros differ by more than the permitted toleranceEmta.

Legal basis: the rules apply to export declarations filed through EMTA's AES X-tee interfaceEmta under Süsteemi AES x-tee liidese spetsifikatsioon v1.6 with Lisa 1 message and rule tables.

Update AES X-tee export declaration software for the v1.6 validation rules and run the new checks against test filings before production testing starts in the second half of November 2026.

Sources