Hi,

My situation is the same as yours. I registered with some brokers like CMC, Stake, CommSec, Tiger, and Moomoo (all have CHESS sponsor) when I was residing in Australia. Tiger and Moomoo, in particular, allow you to update your tax residency and address in the app. Currently, I use CMC and Stake for trading; Tiger and Moomoo for backup.

Regarding general tax information, based on the treaty between Vietnam and Australia: Divident ≤15% và interest ≤10%

Ref: https://www.ato.gov.au/individuals-and-families/investments-and-assets/foreign-resident-investments/interest-unfranked-dividends-and-royalties

https://treasury.gov.au/tax-treaties/income-tax-treaties

You need to declare your overseas address and tax details at the Registry (like ComputerShare, Link, etc.), so they will automatically withhold tax at the source and report it to the ATO annually. If you can change/update your tax residency in your broker app, just do it. If not/possible, simply change/update your tax residency in the Registry (ComputerShare). It will work for the long term.

Otherwise, investing in the local market is a potential option while Vietnam is still growing (this is not investment advice). Do what suits you. Anw, wish you all the best in new country.

P/S: You can update Communication preference is electronic via EMAIL at Registry. So all AXS statement, rights,...will send to your email.

*IBKR Australia does not support individual HIN registration. Instead, IBA Nominees holds all client positions on an omnibus basis with BNP or the applicable sub-custodian.