Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Steps and timing of the SEIS investment (in the UK)
You make the investment in Jan 2016. Assuming the SEIS certificate is issued before 5th April 2016, then you will enter the SEIS investment on your 2015-2016 tax return and claim the relief in that year. If the certificate is not issued in time then you will enter it in the 2016-2017 tax return and get the relief then. Note: I am assuming that the startup is already registered with the SEIS scheme by someone else - because if you are asking about how to go about that, I don't think that is an issue of personal finance.