invoiceHeader_amexDataTAA1 {#invoice-header-amex-data-taa1}
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Transaction Advice Addendum (TAA) fields.  
This topic provides a description of the sequence of fields from invoiceHeader_amexDataTAA1 to invoiceHeader_amexDataTAA4.  
These fields provide a description to display on the customer's American Express card statement. They are frequently used for Level II transactions. When you provide TAA fields, first use invoiceHeader_amexDataTAA1, then invoiceHeader_amexDataTAA2, then amexdata_taa2, and so on. Before using these fields, contact customer support to have your account enabled for this feature.
This field is available only for the `American Express Direct`, `Chase Paymentech Solutions`, `FDC Compass`, `Visa Platform Connect`, and `Worldpay VAP` processors.

Specifications {#invoice-header-amex-data-taa1_d571e67}
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* **Data Type:** String
* **Data Length:**
  * **`Worldpay VAP`:** 26
  * **All other processors:** 40

Mapping Information {#invoice-header-amex-data-taa1_d571e101}
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* **REST API Field:** orderInformation.invoiceDetails.transactionAdviceAddendum\[\].data
* **SCMP API Fields:**
  * amexdata_taa1
  * amexdata_taa2
  * amexdata_taa3
  * amexdata_taa4
* **Simple Order API Fields:**
  * invoiceHeader_amexDataTAA1
  * invoiceHeader_amexDataTAA2
  * invoiceHeader_amexDataTAA3
  * invoiceHeader_amexDataTAA4

Processor Field Names {#invoice-header-amex-data-taa1_d571e161}
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This list provides the Level II/Level III processor field name for each processor that supports Level II or Level III data:

* **`American Express Direct`:** Does not apply
* **`Chase Paymentech Solutions`:**
  * TAA1
  * TAA2
  * TAA3
  * TAA4
* **`FDC Compass`:**
  * TAA1
  * TAA2
  * TAA3
  * TAA4
* **`Visa Platform Connect`:**
  * amexDataTAA1
  * amexDataTAA2
  * amexDataTAA3
  * amexDataTAA4
* **`Worldpay VAP`:** itemDescription