seis How to apply for SEIS & EIS Advance Assurance (Ultimate Guide) Here we provide a comprehensive 'hands-on' overview on how to apply for SEIS EIS HMRC advance assurance aimed at entrepreneurs and founders. Steve Livingston Read more posts by this author. Steve Livingston 1 Jul 2020 • 14 min read Subscribe to IP Tax Solutions Get the latest posts delivered right to your inbox Subscribe Great! Check your inbox and click the link to confirm your subscription. Please enter a valid email address!