Yes. The trading allowance is a tax exemption of up to £1,000 a year for individuals, including for self-employment. You're not obliged to tell HMRC until you earn beyond £1,000, no matter how much PAYE income you have.
The form is linked to the agent account and you can find the form here - https://www.gov.uk/guidance/submit-detailed-information-before-you-claim-research-and-development-rd-tax-relief
Keep in mind also that you may need also to do a Claim Notification form too, so read the criteria (form and criteria at this page) - https://www.gov.uk/guidance/tell-hmrc-that-youre-planning-to-claim-research-and-development-rd-tax-relief
Are vouchers for surveys completed taxable and to be put on a self-assessment tax return?
I often do surveys in return for small voucher amounts, and these build up over the course of a year, eg £200. I do this alongside my main job.
Are these voucher amounts to be put on a tax return?