How do I file for SEIS investment?

To apply for the Seed Enterprise Investment Scheme (SEIS), you need to:

• Apply for advance assurance. If you've obtained an advance assurance, you need to provide copies of any documents that have changed since your advance assurance application was approved.
• Email HMRC to request for the application form in Welsh
• You need to complete a separate application for each share issue.
• When you’ve issued your shares, you need to complete a compliance statement (SEIS1) and send it to HMRC.
  

You may submit your application by email (enterprise.centre@hmrc.gsi.gov.uk), or via post.

The postal address is:

Venture Capital Reliefs Team

WMBC

HM Revenue and Customs

BX9 1BN

For further information, see HMRC's resource or the the SEIS section of the HMRC Venture Capital Manual.