Estimated figures
Estimates are figures that you want HM Revenue and Customs to accept as final.
If any estimates have been used, for example, in calculating costs or your taxable income, enter 'Yes' and provide the details in the 'Other information' box at the end of the return.
You should provide details of what has been estimated, why it has been estimated and how the figures were arrived at.
If your computation doesn't include any estimated figures enter 'No'.