Filling in the DA-1

There is a difference between deducting 2x 15% (US WHT + supplementary withholding by Switzerland) or 1x 30% (all US WHT).

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Yes I understand
No problem

The point is that it’s not wise to just add this extra info without explaining the whole concept of Level 1 and level 2 taxes. This has been discussed extensively in this forum.

I will see how to incorporate it somehow

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Assuming I am with IBKR UK, I understand that:

  1. I don’t need to fill out R-US 164 - because this is relevant for when you use a Swiss Broker not a foreign one
  2. If I have US-domiciled funds held at IBKR, I could potentially fill out DA-1 to reclaim the WHT.

Did I get that right?

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Correct.

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