---
schema_version: "1"
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title: Taxing and Promotion Adjustments with the Manual Salesforce Tax Solution
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/commerce/264-0-0/comm_tax_with_adjustments.md
canonical_url: https://help.salesforce.com/s/articleView?id=commerce.comm_tax_with_adjustments.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 2b27acbeb09e3a7f7d04fee54920e6e6e5d86fd0620b0c5077a8125f5e31f842
description: Items that are part of a promotion or tier adjustment in a B2B store configured with the manual Salesforce tax solution are taxed after the promotion amount is subtracted from the product price. The tax is calculated on the adjusted amount.
products:
  - Commerce
  - B2B Commerce
release: "264"
---
# Taxing and Promotion Adjustments with the Manual Salesforce Tax Solution

Items that are part of a promotion or tier adjustment in a B2B store configured with the manual Salesforce tax solution are taxed after the promotion amount is subtracted from the product price. The tax is calculated on the adjusted amount.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition"><colgroup><col></colgroup><tbody><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;"><a href="https://help.salesforce.com/s/articleView?id=commerce.comm_editions.htm&amp;language=en_US" target="_blank">View supported editions</a>.</td></tr></tbody></table>

[Which Salesforce Commerce Product Do I Have?](https://help.salesforce.com/s/articleView?id=commerce.comm_what_product.htm&language=en_US)

To calculate the gross tax, use this formula: `(grossPrice) * taxRate/(1+taxRate)`.

![Example](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-commerce-comm-264-0-0-production-enus/d863e308-482a-4dfa-8d20-2a94737d394a/images/icon_example.png)

Example

A cart contains three products, but 12 items in total.

- Product1: One item with a unit price of $110. The tax rate is 10%. There’s a 20% off promotion for this item.
- Product2: One item with a unit price of $120. The tax rate is 20%. There’s a 20% off promotion and a $12 off coupon promotion for this item.
- Product3: Ten items with a regular unit price of $99. The tiered promotion price is $88 each when you order 10 or more. The tax rate is 10%.

The total tax is $102.

- Product1: (110-22)\*.10/(1+0.10) = $8 tax
- Product2: (120-24-12)\*.20/1+.20) = $14 tax
- Product3: (10\*88)\*.10/(1+0.10) = $80 tax