A bit of a frivolous post, though if anyone can point to official guidance please do so.
My wife has a very small self-employment. She had always dealt with her tax return before we met, and likes to keep up with relevant matters herself. She was in a webinar by a trade body yesterday, and the presenters kept on treating it as rhyming with "cease". She hadn't thought about it before, but that just felt wrong to her.
Alternatives she has considerd
- Rhyme with seize
- Rhyme with says
- Rhyme with nice (her preference now she has thought about it)
Personally, when I refer to it in speech at all, which is rare, I have been saying the individual letters and not tried to make it a word.