Hi nickmgibson1504
Unfortunately you don’t confirm the source of income that you wish to set these expenses against.
Please see notes guidance at:
How to complete your tax return for Self Assessment and go to Employment Notes SA102 advising Box 20 or Self Assessment notes page SEFN 6 under Simplified expenses (flat rates)
You may also find out information to assist, after submitting your form, by creating accounts in:
• your
personal tax account
• the
official HMRC app
Thank you