German to English Bus/Financial Law: Taxation & Customs Abbreviations used in financial statements

naBA: this appears several times in tables forming part of a set of financial statements, sometimes alone, sometimes combined with other terms, e.g. "USt-VB naBA", "Abzug naBA", "naBA lt. Bp [presumably "laut Betriebsprüfung"]";

VB: likewise, this appears in various contexts in the same document, e.g. USt [Umsatzsteuer]-VB naBA", "USt-VB Grundstücksabwicklung", "USt-VB Kfz-Überlassung Dr. [name]"