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91 lines
3.3 KiB
Markdown
91 lines
3.3 KiB
Markdown
# Calculate Taxes Manually in Checkout
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In this document, you’ll learn how to manually calculate taxes during checkout if you have automatic tax calculation disabled in a region.
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## Overview
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By default, taxes are automatically calculated by Medusa during checkout. This behavior can be disabled for a region using the Admin APIs or the Medusa admin to limit the requests being sent to a tax provider.
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If you disable this behavior, you must manually trigger taxes calculation. When taxes are calculated, this means that requests will be sent to the tax provider to retrieve the tax rates.
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---
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## How to Manually Calculate Taxes in Checkout
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This section explores different ways you can calculate taxes based on your purpose.
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### Use Calculate Cart Taxes Endpoint
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The [Calculate Cart Taxes](https://docs.medusajs.com/api/store/#tag/Cart/operation/PostCartsCartTaxes) endpoint forces the calculation of taxes for a cart during checkout. This bypasses the option set in admin to not calculate taxes automatically, which results in sending requests to the tax provider.
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This calculates and retrieves the taxes on the cart and each of the line items in that cart.
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### Use CartService's retrieve Method
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The `CartService` class has a method `retrieve` that gets a cart by ID. In that method, taxes are calculated only if automatic taxes calculation is enabled for the region the cart belongs to.
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You can, however, force calculating the taxes of the cart by passing in the third parameter an option containing the key `force_taxes` with its value set to `true`.
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For example:
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```jsx
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cartService.retrieve("cart_01G8Z...", { }, { force_taxes: true })
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```
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:::tip
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You can learn how to [retrieve and use services](../services/create-service.md#using-your-custom-service) in this documentation.
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:::
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### Use CartService's decorateTotals Method
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Another way you can use the `CartService` to calculate taxes is using the method `decorateTotals`:
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```jsx
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export default () => {
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// ...
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router.get("/store/line-taxes", async (req, res) => {
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// example of retrieving cart
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const cartService = req.scope.resolve("cartService")
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const cart = await cartService.retrieve(cart_id)
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// ...
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// retrieve taxes of line items
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const data = await decorateTotals(cart, {
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force_taxes: true,
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})
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return res.status(200).json({ cart: data })
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})
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}
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```
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The `decorateTotals` method accepts the cart as a first parameter and an options object as a second parameter. If you set `force_taxes` to `true` in that object, the totals of the line items can be retrieved regardless of whether the automatic calculation is enabled in the line item’s region.
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### Use TotalsService
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You can calculate and retrieve taxes of line items using the `getLineItemTotals` method available in the `TotalService` class. All you need to do is pass in the third argument to that method an options object with the key `include_tax` set to true:
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```jsx
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const itemTotals = await totalsService
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.getLineItemTotals(item, cart, {
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include_tax: true,
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})
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```
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:::tip
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You can learn how to [retrieve and use services](../services/create-service.md#using-your-custom-service) in this documentation.
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:::
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---
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## See Also
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- [Tax-Inclusive Pricing Overview](inclusive-pricing.md)
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- [CartsService](../../../references/services/classes/CartService.md) and [TotalsService](../../../references/services/classes/TotalsService.md)
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