Hi Ortho,
On SA106
Self Assessment: Foreign (SA106) EnglishCymraeg
Enter the gross interest received and the tax deducted on page F2, in the section for 'Interest and other income from overseas savings'.
In an online tax return, tick 'yes' to foreign income in page 1 of 3, when tailoring your return.
In the section fill in your return, click on foreign income and tick the box 'Interest and other income from overseas savings' and save and continue. Enter the gross interest and the tax deducted.
You can claim a foreign tax credit of up to 100% of the foreign tax paid.
Thank you.