i.MAS notifications: what EDS, i.SAF, i.VAZ and other letters from the tax authority mean
A short reference for accountants: which notifications i.MAS and the tax authority’s EDS send, what each means and how quickly you need to respond.
First tell which i.MAS or tax-authority email actually needs action. A reminder or a missing-return notice means file. A rejection or error means fix. A query means reply by the deadline in the letter. A submission confirmation is only something to keep.
i.MAS (the Smart Tax Administration System) is a set of tax-authority subsystems through which companies submit data on invoices, consignment notes and accounting. Together with the Electronic Declaration System (EDS) and "My VMI" it generates a lot of automatic notifications. Here is what each of them means.
The main i.MAS subsystems
- i.SAF – registers of received and issued invoices. VAT payers file by the 20th of the following month.
- i.SAF-T – the standard accounting data file (SAF-T), submitted on the tax authority's request.
- i.VAZ – consignment note (goods transport document) data. Submitted in advance, before transport begins.
- i.APS / i.EAA – accounting subsystems for small business.
Which notifications arrive by email and what they mean
- Return or report reminder – the filing deadline is approaching. Action: file by the date given.
- Notice of a missing return – the deadline has passed, the document was not received. Action: file immediately.
- Submission confirmation – the document was accepted. Action: keep it as evidence.
- Error / rejection notice – discrepancies were found or the document was rejected. Action: fix and resubmit.
- Query or request to clarify – the tax authority asks for an explanation. Action: reply within the stated period, usually a few working days.
- Notice of control actions or an audit – top priority, respond the same day.
Why this becomes a problem in an accounting firm
When one mailbox receives notifications for dozens of companies, the letters blur together: some are purely informational, some require action within 3–5 days. Sorting them by hand takes time, and an important query can go unnoticed.
Automatic sorting
Žymeklis receives these emails at a unique address for each company, recognises the notification type (FR0600, GPM313, i.SAF, authorisations and so on), links it to the client and shows which ones need action. See the deadline summary in the filing deadline calendar.
This article is for general information only and is not individual tax or legal advice. For specific cases, rely on current information from VMI, Sodra and the Centre of Registers.
Read next
- How to forward VMI and i.MAS notifications to your accountantVMI sends the “new document” email to the confirmed Mano VMI address. The accountant needs that address – or a unique address per company.
- How an accounting firm tracks filings across dozens of clientsYou do not need a generic “the 25th is coming for someone”. You need a list: which companies still have no FR0600 or GPM313.
- FR0600 vs i.SAF mismatch: what to do when the return is “accepted with deficiencies”VMI compares FR0600 boxes 29–31 with VAT on issued invoices in i.SAF. A mismatch usually has to be cleared within 10 days.