Hi,
You will need to declare the dividends in the foreign section of Sa106. column A is the 3 letter code for the country the dividends relate to, column B is the total dividend before tax taken off and column C is the tax taken off. If you are claiming the remittance basis, as a non domiciled resident, you would show special witholding tax in column D. All entries should be in pounds sterling.
Tax on foreign income
Thank you.