Search
Contact
03.06.2019 | KPMG Law Insights

Subsequent declarations during an ongoing external audit – Important amendment to the AStBV

Subsequent declarations during an ongoing external audit – Important change to the AStBV

Tightening of the administrative instruction on the treatment of subsequent declarations during an ongoing external audit

I. Background
As soon as a taxpayer realizes before the expiry of the assessment period that a tax return submitted by him or on his behalf is incorrect, he must immediately notify the tax office and correct it (Section 153 (1) sentence 1 AO). This obligation exists irrespective of whether an external audit has already been ordered for the tax period in question or whether it has even already begun. A notification is only dispensable for the specific audit period insofar as the tax audit has already determined the error in question (AEAO to § 153 AO, No. 3 sentence 5). As part of preventive counseling, the aim is regularly to ensure that a mandatory correction report also fulfills the requirements of a self-disclosure that exempts from penalties or fines (Section 371 of the German Fiscal Code (AO)) as a precautionary measure (as a so-called self-disclosure correction). However, an exempting voluntary disclosure is no longer effectively possible for taxation periods and tax types for which an audit order has already been announced. A voluntary disclosure exempting from fines pursuant to Sec. 378 para. 3 AO is still permissible in these cases, however.

II. Previous situation of instructions of the tax authorities
The treatment of such notifications is mainly regulated within the tax authorities by the Application Decree on Section 153 of the German Fiscal Code (AO) and the Instructions for Criminal and Penalty Proceedings (Tax) (AStBV). Accordingly, voluntary disclosures (even if they are not designated as such but are at least recognizable) are and were always to be forwarded to the Office for Fines and Criminal Matters (BuStra) for examination. In addition, such declarations must also be forwarded to the BuStra where there are indications that taxes have previously been intentionally or recklessly evaded. There is no obligation to submit declarations to the BuStra if they are undoubtedly based on subsequent knowledge of the taxpayer (no. 132, para. 1 AStBV). De facto, this resulted in a very considerable scope of judgment for the assessment officer when dealing with notices of correction.

III. Change due to the AStBV 2019
Effective January 1, 2019, the current 2019 AStBV went into effect.
This massively restricts the tax offices’ scope for assessment when dealing with subsequent declarations. Specifically, the tax offices are now instructed to submit all subsequent declarations (regardless of their designation or material content) that are submitted in the course of an ongoing external audit to the BuStra for examination (No. 131 (1) sentence 2 AStBV ). In our opinion, it can be assumed that this instruction will be interpreted comprehensively by the assessment officials and that, in the case of ongoing external audits, subsequent declarations for periods not (yet) covered by this audit will also be submitted directly to the BuStra.

IV. Recommendation for action
The tightened audit procedures outlined above can prove extremely treacherous in correction and post-declaration cases. In the future, the BuStra will receive significantly more cases of supplementary declarations for review than before. This applies in particular to cases in which it is no longer possible to make an exempting voluntary disclosure due to the blocking effect caused by the external audit. It is obvious that this also increases the risk of prosecution. If the specialists in the form of the BuStra are always brought on board in correction cases on the part of the tax office, it is advisable from the company’s point of view to also involve specialized lawyers and tax consultants at an early stage, in particular also with regard to a defense under criminal tax law that may subsequently be necessary. Together with our tax experts at KPMG AG Wirtschaftsprüfungsgesellschaft, we will be happy to assist you.

Please feel free to contact us with any questions you may have on these topics.

Explore #more

17.07.2026 | KPMG Law Insights

Action Plan Against Tax Crime: Voluntary Disclosure Allowing for Immunity from Prosecution to Be Abolished

Tax and financial crime will be prosecuted more rigorously in Germany going forward. On July 16, 2026, Federal Minister of Finance Lars Klingbeil and Federal…

15.07.2026 | In the media

KPMG Law Guest Post on the DVNW Procurement Blog: Section 97a of the German Act Against Restraints of Competition (GWB): Slight Relief for Lump-Sum Contracts

On July 1, 2026, the Act on Accelerating the Award of Public Contracts—the Public Procurement Acceleration Act, for short—entered into force. A key change is…

15.07.2026 | In the media

KPMG Law Statement on “tagesschau”: Recycled Building Materials Rarely Used Despite Shortages

Gravel, sand, and crushed stone are becoming scarce and more expensive. Recycled construction materials could help. But despite advanced technology, there are major hurdles, especially…

15.07.2026 | In the media

KPMG Law Statement in *Private Banking* Magazine: How the ECB Plans to Launch the Digital Euro

The banking industry is awaiting the ECB’s decision on which institutions will be selected for the digital euro pilot project. From Germany, Deutsche Bank, Helaba,…

10.07.2026 | KPMG Law Insights

New Packaging Implementation Act tightens obligations for companies

  Co-author: Séverine Sieprath, Director of Audit, KPMG AG Wirtschaftsprüfungsgesellschaft   The Packaging Implementation Act (VerpackDG),…

09.07.2026 | In the media

Op-Ed in *Versicherungsmagazin*: D&O Insurance—A Legal Safety Net in Turbulent Times

Liability risks for executives are increasing significantly: New regulatory requirements such as NIS-2, CSRD, and the Supply Chain Act are expanding the responsibilities of managing

02.07.2026 | KPMG Law Insights

Registered mail with return receipt no longer provides proof of delivery—here are some alternatives

Registered mail with return receipt, when used as part of electronic documentation, no longer constitutes prima facie evidence of a…

02.07.2026 | Deal Notifications

KPMG Law advises the Prinzhorn Group on the acquisition of Stora Enso’s German facilities

KPMG Law has advised Mosburger GmbH, a subsidiary of Dunapack Packaging and part of the Austrian Prinzhorn Group, on the acquisition of Stora Enso’s German…

02.07.2026 | In the media

KPMG Law Interview in Focus Business: EmpCo Is Coming: Sustainability Marketing Becomes a Top Priority

Stricter EU rules set clearer boundaries for climate pledges and social claims. KPMG Law expert Manuela Meyer explains which claims must be verified and how…

29.06.2026 | KPMG Law Insights

Embedding Digital Sovereignty in the Enterprise – Legal Requirements for IT Systems

Digital sovereignty is an important strategic success factor, and many measures are also required by law. Through legislation such as the Data Act, NIS-2, the…

Contact

Dr. Heiko Hoffmann

Partner
Munich site manager
Head of criminal tax law

Friedenstraße 10
81671 München

Tel.: +49 89 59976061652
HHoffmann@kpmg-law.com

Arndt Rodatz

Partner
Head of criminal tax law

Fuhlentwiete 5
20355 Hamburg

Tel.: +49 40 360994 5081
arodatz@kpmg-law.com

© 2026 KPMG Law Rechtsanwaltsgesellschaft mbH, associated with KPMG AG Wirtschaftsprüfungsgesellschaft, a public limited company under German law and a member of the global KPMG organisation of independent member firms affiliated with KPMG International Limited, a Private English Company Limited by Guarantee. All rights reserved. For more details on the structure of KPMG’s global organisation, please visit https://home.kpmg/governance.

KPMG International does not provide services to clients. No member firm is authorised to bind or contract KPMG International or any other member firm to any third party, just as KPMG International is not authorised to bind or contract any other member firm.

Scroll