Thanks, Sam. Yes, if you have a tax return submitted at least from the 2018/2019 tax year (and ideally the two years prior, but that’s not essential if you’ve only been self-employed for under 3 tax years), you could qualify. Your average profits (not turnover) during that period must be under £50,000/year for you to qualify, too.
The SEISS grant is given to self-employed people in June and you can keep working – you just have to have lost *some* income due to COVID-19 to qualify.
Hope that helps!