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# Transactions

At its core, *AvaTax* is designed to help you calculate taxes on a transaction between two parties. The right parameters in the API call help you ensure your tax calculation is correct.

It is important to say that *AvaTax Brazil* uses the characteristics informed on the request to determine the taxation involved in the transaction.

[Previous](https://developer.avalara.com/for-review-only/en/leila-paul/services-calculation-en/transaction_workflow)

[Next](https://developer.avalara.com/for-review-only/en/leila-paul/services-calculation-en/transactions/simple_transactions)

> **Note**
>
> Part of the **Services Calculation** integration guide. [Open the full "Transactions" milestone on Avalara](https://developer.avalara.com/services-calculation-en/transactions/) to see every page in this section.