To calculate tax on taxable income for Special professional income.
1. Turn-on "Other income" via 4 little square located at top right of the CTR.
2.. Select "Income", then "Other"
3. Fill the required data that can be enter at Other income step.
Note: Add only the data you need to add. If you doesn't have business data then it must be left empty.
Besides averaging section user should also properly fill Professional income section on the same page.