Tax software gets Serg search v2 and a document-download scope

Serg søk v2 is Skatteetaten’s new API version for property searchesSkatteetaten. The authority has also created a separate scope for downloading tax letters, as described in its 10 September 2026 briefing for tax-return software suppliersSkatteetaten. Serg v2 excludes properties that should not be added to the tax return, reducing duplicate results. Version 1 will continue working through 2027Skatteetaten.

The v1 example uses vegadresser[0].eiendommer[0].sergEiendomsidentifikator = 77. The v2 example uses treff[0].sergEiendomsidentifikator = “77”, changing the numeric identifier to a string. Display text moves from highlight to visningsTekst, and a new query parameter controls result-set size.

For tax assessments, amendment notices, decisions and information letters, Dialogporten messages now contain document links instead of PDF attachmentsSkatteetaten. A system must retrieve the message through Altinn’s API, extract the document’s api-url and call the download service. Systems with access to tax-return service scopes are also to receive access to the new scope; the access package for the message controls authorisation. A separate gui-url serves logged-in browser users.

The SME26 timetable retains 7 October for delivery-plan version 2. For 30 November, it lists a test-ready version 0.9 information modelSkatteetaten and completed calculation logic and code lists. All “breaking-change” changes must be finished at that milestoneSkatteetaten; suppliers must be informed of, and able to influence, later changes. The 1.0 model freeze is scheduled for 15 JanuarySkatteetaten. Post-freeze model changes require absolute necessity and supplier support. The 4 February opening for UP/SDF assessments and 2027 advance assessments for UP and P is now marked decided. Submission-blocking validations are due by 4 February for UP/SDF and 1 March for personal returns.

Digital-platform rental income is to be prefilled under fastEiendomSomUtleieobjekt when reported on a personal identity number, or naering.oppgavegiver when reported on an organisation number; the latter amount must enter the business specification. Aquaculture partner fields change from finally coordinated resource-rent income to positive/negative income before coordination. Both changes remain in progress.

The personal-return list marks AKTIVITETSPENGER_FOR_UNGE and the reduced expense limit for care of children aged 11 or younger as complete, while youth employment deductions, return-migration handling for exit tax, Svalbard youth allowances and housing sale-value guidance remain in progress. A more precise missing-business-specification validation is planned. Completed business-model items include derived petroleum income/deduction fields, a new permanent-difference type for taxable fund dividends and a temporary-difference type for construction-loan interest, and permission for negative closing values on non-depreciable fixed assets.

Hydropower contract information moves to company level, with new contract, specification and counterparty entities marked complete. Income-specification code lists and a replacement entity for covering purchases remain in progress. Financial-sector balance-sheet and income-statement structures are being split, with effects also for banks, finance companies and non-life insurers. Permanent differences are being split into additions and deductions; the corresponding temporary-difference split remains under consideration.

UP/SDF changes include currency fields for interest-limitation exemptions, Svalbard interest-limitation reporting and a renamed, derived NOKUS wealth entity, all in progress. Percentage fields are restricted to 0–100, except deltakersAndelAvInntektIProsent, deltakersAndelAvFormueIProsent, egenkapitalandelForSelskapetEllerNorskDelAvKonsernet and egenkapitalandelIKonsernregnskap, which retain unrestricted percentages. Planned prefilling changes remove own-share holdings and report securities-fund disposal gains/losses before the shielding deduction. Joint validation and calculation for spouses is an option under discussion and would not support joint submission.

The briefing also gives a workaround for NUF errors in klargjoerforhandsfastsetting for income year 2026: request manual creation of corporate tax liability through “Kontakt oss – skriv til oss”, supplying the organisation number. Suppliers are reminded to disclose unsupported tax topics before contracting and check carried-forward accounting and tax values when customers change systems.

Skatteetaten describes these technical changes in its 10 September 2026 SBS briefing.