Most people aren't eligible to change their domicile, and even if they were, it's your residency, not your domicile, that is taken into account by the ATO when assessing people living offshore.
To summarize, a 'resident' is:
"a person ... who resides in Australia and includes a person whose domicile is in Australia, unless the [ATO] Commissioner is satisfied that his permanent place of abode is outside Australia"
To cut to the chase, "permanent place of abode" is interpreted to mean:
"The Federal Court rejected the Commissioner's argument that a permanent place of abode outside Australia required an intention to live outside Australia indefinitely without any intention of returning to live in Australia in the foreseeable future, other than at some remote, albeit specific, point of time. The Court said that the term "permanent" must be interpreted in the context in which it appears. The Court said that in its context in the "resident" definition a permanent place of abode does not have to be "everlasting" or "forever". It means something less than a permanent place of abode in which a person intends to live for the rest of his or her life. It should be contrasted with a temporary or transitory place of abode outside Australia. ..."
And here's the important part:
"An intention to return to Australia in the foreseeable future to live does not prevent the taxpayer in the meantime setting up a "permanent place of abode" elsewhere. The Federal Court also found that the taxpayer's intention regarding the duration of his stay overseas was only one relevant factor to be taken into account. Of more importance is the nature and quality of use which the taxpayer makes of aparticular place of abode overseas."
The rest can be found at the link I provided above.
Most people aren't eligible to change their domicile, and even if they were, it's your residency, not your domicile, that is taken into account by the ATO when assessing people living offshore.
To summarize, a 'resident' is:
"a person ... who resides in Australia and includes a person whose domicile is in Australia, unless the [ATO] Commissioner is satisfied that his permanent place of abode is outside Australia"
To cut to the chase, "permanent place of abode" is interpreted to mean:
"The Federal Court rejected the Commissioner's argument that a permanent place of abode outside Australia required an intention to live outside Australia indefinitely without any intention of returning to live in Australia in the foreseeable future, other than at some remote, albeit specific, point of time. The Court said that the term "permanent" must be interpreted in the context in which it appears. The Court said that in its context in the "resident" definition a permanent place of abode does not have to be "everlasting" or "forever". It means something less than a permanent place of abode in which a person intends to live for the rest of his or her life. It should be contrasted with a temporary or transitory place of abode outside Australia. ..."
And here's the important part:
"An intention to return to Australia in the foreseeable future to live does not prevent the taxpayer in the meantime setting up a "permanent place of abode" elsewhere. The Federal Court also found that the taxpayer's intention regarding the duration of his stay overseas was only one relevant factor to be taken into account. Of more importance is the nature and quality of use which the taxpayer makes of aparticular place of abode overseas."
The rest can be found at the link I provided above.