Me again!! I now don't know what to do. I registered for self-employment, because I earned £1114.32 last year. I haven't yet had the paperwork. However, during one of my restless can't get to sleep evenings, I remembered that DH took part in a long running project using my account. Some people will remember it - we were asked to recruit people using our accounts, to do the test activity, so that they got more participants quickly. It was made clear to us that this was their earnings. Totalling that all up, it totalled $195 for DH, which means that my earnings were approx £146 less than my received pay. That puts me back under the threshold.
Can I just phone HMRC and say that I thought I was over threshold, but recalculating, I'm not, so can I cancel the request for self-assessment?