Late received foreign distribution after filing self-assessment

[quaver]

I filed my 2019-20 SA in late April . This included a large addition to losses carried forward. In May I received a distribution in US dollars that I subsequesntly discovered had been included in a revised CTC issued by my broker showing the payment date in December 2019. The delay was probably because the broker had changed its name since the last time such a payment came in. If I log in to my HMRC account will I be able to make a change, and if so what exchange rate should I use to value the distribution in sterling? This will of course reduce the figure claimed for losses carried forward. Will I be able to change that too?

[bd6759]

There is a window until January 2021 to amend your return, but now that you know it is wrong you should do so sooner.

The exchange rate is the date of payment, but HMRC don’t usually object to the year average.

[bd6759]

I meant until January 2022 to amend a 2019/20 tax return.

[quaver]

Thanks. And from what I have been reading it looks like this will not be allowable against capital losses, though I would appreciate any guidance on any difference in tax treatment of 'dividend' and 'distribution'