Amending US tax form

[Cutesy]

Hello,

I withdrew a chunk of RRSP money in 2023, and reported it on Form 1116 in February. However 25% Canadian taxes were automatically taken when I withdrew, and so I filed a Canadian tax return for Section 217 and learned today that I will be getting some money back, effectively reducing my Canadian taxes to 15%.
So now I need to amend the US tax form. Should I do that now (May 2nd), or can I just wait until next year to correct it? I owed/paid US a bit of money this year in taxes (under $200) so wondering now if the amount increases, will they charge me interest and is it better to do it sooner rather than later?

Thank you.

[nelsona]

You should amend your1040 using 1040X and sending in a revised 1116. It is unlikely that the lower Cdn tax will result in more US tax, as you probably didn't use much of the Cdn tax on your 1116 anywys.