Lisa, thank you for your prompt reply.
Income for tax credit purposes -
This is any money earned from paid work (overtime only counts if you work the hours regularly), self-employed profits or some benefits (such as contribution-based JSA or employment and support allowance, incapacity benefit (in some cases) or carers' allowance but not child, housing, council tax or disability benefits).
It also includes any extra income above £300 you (or a partner) receive from a pension, savings, renting out a property, or things such as a trust or interest in the estate of a person who has died.
You don’t need to include money paid for child maintenance or your children’s income and some maternity benefits are partly excluded.
For the self-employed, income is any profit made in the last tax year, as submitted on your tax return. If you haven't finished your tax return yet, make a best guess based on your profit so far. If your business is new and you've had no income from it in the last year, you can leave the income section empty.
I hope this is helpful and answers your question.
If you have any other questions, please ask me before you rate my service – I’ll be happy to respond.