Hi List,
Updated Comments on bug 612957. It seems this has been around for a while.

How are others using GnuCash in Australia with 10% GST (or other locations with Tax Included amounts being the normal way of expressing prices) entering Invoices to get around this issue?

Any advice appreciated, as I would like to upgrade to a more current version of GnuCash, but may need to stick with the old version while this issue is around if I can't find a workable solution.

Note, I have had the odd Invoice/Bill on the old system where the TAX amount is a cent different from the shops Receipt, but the Invoice/Bill total has always been correct.  I guess maybe this is the same rounding issue, just affecting the calculated values rather than the entered values.

Thanks,
Jeff.

On 4/6/22 10:46, Jeff wrote:
Thanks Adrien, I will report it with the details.

On 4/6/22 00:20, Adrien Monteleone wrote:
I'd file a bug, label it as 'Regression' since a change broke something that worked.

Be sure to indicate the version that worked and the tested versions that do not.

I vaguely recall some work done to 'improve' rounding due to other bugs around the 3.x series. I guess this slipped through or wasn't exposed/tested to catch it.


Regards,
Adrien

On 6/3/22 8:49 AM, Jeff wrote:
Thanks Adrien,
Yes, since posting I have done some more testing, and it does appear to be a rounding issue when using Inclusive Tax. I have also tried the same example in 4.10 Flatpak, and the issue remains the same.

I assume that in version 2.6.17 the calculation was made in a different way.  I can't see any preferences that may be set differently, that may be able to change the behaviour. It appears that when entering Inclusive Tax amounts, behind the scene it actually calculates the Exclusive amount, then adds those figures together to work out the Invoice Total.

Is there any way to get the calculation behaviour back to how it worked in 2.6.17?

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