Hi DEHafod,
Please see guidance at:
Check if you need to send a Self Assessment tax return regarding your circumstances.
In general terms if your self employment commenced on or after the 06 April 2024 then any income arising from this date should be reported in a tax return for the year 2024/2025. The return will be issued after the end of the tax year on 05 April 2025. However you may receive a Notice to File before this.
Please ensure that you have registered through
Become a sole trader: Register as a sole trader.
However you state that your second job is an “employment” that commenced in November 2024 and you were paid on 17 December.
Please
Check employment status for tax to determine if the job is one of employment or self employment.
Thank you