10/13/2026
CRS 2.0, DAC8 and CARF all turn on one document: the customer's self-certification, obtained at onboarding. Our updated guide covers what it must contain, how the reasonableness test works, and the start dates country by country. https://taxdo.com/resources/blog/post/crs-2-0-dac8-mandatory-self-certification-guide
# The Day 1 Standard: Mandatory Self-Certification Under CRS 2.0, DAC8 and CARF, and How to Meet It > What a valid self-certification needs under CRS 2.0, DAC8 and CARF: content, TIN, the reasonableness test, start dates by country and how to meet Day 1. Source: https://taxdo.com/resources/blog/post...