# Sales price update (Contribution ratio) - Invalid tax code combination. Sales tax group and Item sales tax group ALL.

**URL:** https://www.dynamicsuser.net/t/sales-price-update-contribution-ratio-invalid-tax-code-combination-sales-tax-group-and-item-sales-tax-group-all/52117
**Category:** User Forum
**Created:** [April 14, 2014, 7:24pm UTC](https://www.dynamicsuser.net/t/sales-price-update-contribution-ratio-invalid-tax-code-combination-sales-tax-group-and-item-sales-tax-group-all/52117 "2014-04-14T19:24:23Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![DGermain](https://avatars.discourse-cdn.com/v4/letter/d/4da419/32.png) [@DGermain](https://www.dynamicsuser.net/u/DGermain)
#### Post date: [April 14, 2014, 7:24pm UTC](https://www.dynamicsuser.net/t/sales-price-update-contribution-ratio-invalid-tax-code-combination-sales-tax-group-and-item-sales-tax-group-all/52117/1 "2014-04-14T19:24:23Z")

</div>

Hi,

I’m trying to set automatic sales price based on a contribution ratio for a specific released products. In the Released product détails form, the price update is checked for the Latests purchase price. In the Sales price model (Sell \> Price update \> Sales price model), I do select "Contribution ratio, the Base price is “Purchase price” and I add a contribution ratio (eg. 10%).

The base sales prices is updated automatically when the purchase is updated (manually or through a PO invoice posting), but I have this error message: “Invalid tax code combination. Sales tax group and Item sales tax group ALL.”

What is the problem? We’re live, and the Item sales tax group is correctly set (ALL), but I don’t understand the meaning of the Sales tax group. All the sales tax codes are set ok, so we shouldn’t see that message.

I know it’s possible to remove the error message by changing the LedgerParameters → Tax → Check Tax Groups to “None”. But I don’t want to do that, since I don’t want to see mistakes by the users with the sales tax codes elsewhere.

Someone can help?

Thanks!