[Closed] HMRC Q

A quick HMRC/tax question, if it's not too much trouble?

I do an occasional bit of freelance writing in addition to my main job. The main job is PAYE, but for the writing I'm paid gross.

It probably comes to just a little over £1200 over the last year, but that's before any expenses are considered.

However, I'm struggling to find a way of declaring this to HMRC.

I don't fill in a self-assessment return because in preceding years they decided I don't earn enough, so I went through a phase of filling one in one year, then being told I didn't the next, then being told I did, then being told I didn't. Anyway, finally received a letter saying I didn't need to conclusively, but if I earned any more non-PAYE income over a certain threshold (which, from [url= https://www.gov.uk/income-tax/how-you-pay-income-tax ]here[/url]) is £2,500 p/a, I would need to contact them.

Anyway, I haven't earned more than that. Their advice online is to contact them if you earn below that threshold. Thing is, I've tried and tried, but haven't ever been able to speak to someone.

Should I just write to them? Anyone have a different way of contacting them? Should I just send them a cheque?