AU Tax - Consistent rollover of percentages in individual deductions
There is a difference in functionality between D5 and D8 in the AU individual tax return form. When deductions are entered in D5, the default deductible percentage is 100%, and whatever percentage is entered here (eg 40% phone) is rolled over when the tax return rolls over to the next year.
In D8, the default deductible percentage is 0% (inconsistent with D5, easy to miss when quickly completing a tax return, requires you to manually type '100%' every line item - why would you enter a 0% deduction?) and the manually entered percentage does not roll over to the next year - the percentage resets to 0% every year. This can easily lead to errors where deductions aren't correctly claimed (claiming 0% of a legitimate expense) and creates additional workflow requirements where each year you may need to look up again the % claimed for items.
Most specifically, it's not consistent with the functionality that already exists in D5 - the code from D5 should easily be able to be copied down to D8, and the default percentage easily changed to 100% to be consistent across sections.

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Jen Heath commented
I accidentally claimed 0% of my clients five-figure investment management fees and had to amend the next year, feeling like a peanut!
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Andrew Luks commented
Ah I've JUST lodged a support ticket for this as I thought it was a bug. Not sure how this one doesn't get more attention as I'm betting I'm not the only one that's been pulled up by a client who actually reviews their return and notes the 0% deduction at D8. Egg on my face and it's only happened the one time. My guess is that many individuals are missing deductions where this 0% has been missed by tax agent and client.