You can find all the bank transactions from 'account transactions' -page.
You can filter incomes by clicking 'incomes' button.
Select the transaction that needs to be assigned and then click 'assign'
After this you have two different options to choose from
1. either you create a new income with this transaction (use this option if you don't have an invoice / sales report in the UKKO -service yet)
2. or add to income (you this option if you already have the invoice / sales report added to UKKO -service)
If you clicked 'create new income' , just proceed and fill in all the * marked fields and attach the invoice / receipt / sales report to this entry.
If you clicked 'add to income', choose the income from the dropdown menu to which you want to link the selected transaction.
Save and exit.