Hi,
Please see:
Check if you need to tell HMRC about your income
This advises:
When you are telling HMRC about your income, you will need to report the income for the tax year, which is from 6 April to 5 April the following year.
Some online platforms will show your income for the calendar year, from 1 January to 31 December. If this is the case you will need to work out the income for the tax year before using the tool.
Thank you.