Overseas Employment income is reported on the SA102 Employment pages, and the details are entered into the Employment data entry screen.
Do not enter any foreign tax paid on the employment income into the UK Tax taken off field as this is for UK tax paid only.
Review the section entitled Foreign earnings and deductions and enter any Foreign earnings not taxable in the UK and any Foreign tax for which tax credit relief is not being claimed.
The foreign tax paid on the employment income for which tax credit relief is being claimed is entered into the Foreign tax paid on other income data entry screen.
Ensure that Employment income is selected in the Where is this income entered? Box.
More information can be found in the HMRC notes to Employment pages