Hi Rhubarb
Yes if you gross income from the Self Assessment is £1000 or less then if you do not meet the criteria then your Self Assessment can be closed for that tax year.
If this is the case you can contact HMRC to update
Self Assessment: general enquiries.
If not yet registered then you can wait until the tax year end for 2024/25 and if above the £1000 you can register at that time and the online filing date will be 31 January 2026.
Thank you