Can I change how GnuCash calculates sales tax?

[R. Victor Klassen]

I've encountered the same thing, although I'm not even sure it is always whether the tax calculation is per-item or on the total.  

I suspect that there are small numerical issues in the calculation - and I'm not saying whose calculation, the merchant's or GnuCash's - which lead to occasional inconsistencies in the calculation.  Things like one using double precision floating point, while the other uses whatever was built into some cash register years ago and is not being emulated in whatever cash register they currently have.

Quickbooks calculated the sales tax, and autofilled a line that you could then edit to correct it.   I've not seen the same in GnuCash.


On 2013-03-30, at 5:32 PM, reidun76 wrote:

> Hi, I live in Alberta, Canada, and I occasionally have a small problem with
> how GnuCash calculates sales tax. It seems that most vendors charge sales
> tax based on the total amount of the taxable items, while GnuCash calculates
> it for each item and then adds up the total. Usually this works fine, but
> once in a while I run into a discrepancy of a penny. If it is a penny too
> much sales tax, I can usually play around with item amounts, such as for a
> $5.99 item, changing the amount to $5.9899. This doesn't affect the total
> item amount, and will often bring the tax down one cent. Also, sometimes
> GnuCash calculates 1 cent too little tax. I get around this by adding a line
> to the bill just for the extra cent GST.
> 
> Is there a better way to be doing this? I'm wondering if maybe there's a
> setting somewhere to change from calculating GST on a per-item basis to
> calculating based on the total amount of taxable items. I checked around in
> Preferences, but didn't see anything there. Am I missing something obvious?
> 
> Thanks!
> 
> 
> 
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