Sloth

You should also bear in mind that if you're leaving Australia permanently, you become a non-resident for Australian tax purposes, and any bank interest will be subject to withholding tax. This page explains it: https://www.canstar.com.au/savings-accounts/withholding-tax-savings-account/ This para is relevant: "The ATO explains that if you are a foreign resident, your Australian bank will automatically withhold tax on any interest earned on savings accounts. The rate of tax withheld depends on whether you let the bank know your overseas address. If you provide an address, withholding tax works out at 10%. Without details of your overseas address, tax is withheld at 47%."

We're both optometrists. No ageism, just casual racism.

We moved here when I was 50 and my wife was 42, and definitely worth it in our case.

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/833689/aust-indiv2003.pdf

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Will you satisfy any of the conditions of release before you leave Australia? https://www.ato.gov.au/Individuals/Super/Withdrawing-and-using-your-super/

This explains split year treatment: https://www.litrg.org.uk/tax-guides/migrants/residence-and-domicile/what-split-year-treatment

There are possible tax implications if you rent your house out, decide not to return to Australia, and subsequently sell the house as a foreign resident. https://atlaswealth.com/news/selling-australian-real-estate-as-an-expat/

https://www.gov.uk/government/publications/social-security-abroad-ni38

We're heading back next year and plan to use Wise. We've been using them for several years to send money in both directions. Opening an account is straightforward enough. Have you told the receiving bank in the UK what you're planning to do? The last thing you'll need to happen is your account being frozen for suspicious activity.

Why would you complete a UK tax return if you're resident for tax purposes in Australia?

Here's how to pay once approved https://www.gov.uk/pay-class-2-national-insurance/bank-details The first time I paid, you could do it by cheque, and I wrote on the back of the cheque which years I wanted the payments allocated to (after having first spoken to the Future Pensions centre to find out which years were worth paying). The second time, cheques weren't allowed so I paid for a single year using the above link, and it was allocated randomly to an empty year which didn't produce an uplift to my final amount, so I then had to phone to request that it be reallocated to the correct year. It was a bit of a faff but easy to fix.

If you're referring to box 3 on the CF83, I put NONE.

Yes, I paid 12 missing years.

You have to wait for a reply to say you've been approved (or not) and then you can.