by maths on Tue Jan 24, 2012 8:14 pm
Only sterling amounts can be entered on the tax return.
Re a dividend, the amount in foreign currency at the date the dividend arises (broadly the day it is declared to be paid) should be converted into £; the w/tax converted on the day it is levied.
It is the gross dividend in £ which is subject to UK income tax less credit for the Swiss tax paid on it (eg the w/tax). However, the rate of w/tax applied is that applicable under the UK/Swiss DTA and thus the 35% non-treaty rate cannot be claimed as the rate under the DTA is less.
If 35% was withheld the excess over the DTA rate needs to be claimed back from the Swiss tax authorities.