Expenses for respite care

Hello: For 14 days in every 28 days, I look after a young man with learning difficulties. He stays overnight with me at my house. I'm employed by his parents with money that is provided to them by the local authority. Please can someone tell me what expenses I can deduct when it comes to filling in my tax return as I can't seem to find any official guidance out there? Thanks

Hi James Grayston,
Please refer to guidance at:
Expenses if you're self-employed
And:
Simplified expenses if you're self-employed
Thank you.