3040629 - Error message encountered when maintaining MX1 of Mexico tax number

When maintaining Tax Category: MX1 of Mexico tax number, the error message: Tax code 1 is not valid (Message no. AR129) occurs.

SAP S/4HANA Cloud Public Edition

1. Open Maintain Business Partner app.
2. Select a business partner.
3. Switch between display to change mode.
4. Go to the Identification Tab and scroll down to the Tax numbers Section.
5. Enter Tax Category: MX1 and Tax number.
6. Press Check / Save button.

Tax number does not meet the requirements set by SAP.

Tax number will have different filling requirements according to whether natural person is selected:

• If you activate the Natural Person checkbox:

1. The length of tax number must be 13.
2. The first 4 digits of the Tax Number must be letters and 5 digit to 10 digit of the tax number must be numbers.

• If you inactivate the Natural Person checkbox:

1. The length of tax number must be 12.
2. The first 3 digits of the Tax Number must be letters and 4 digit to 9 digit of the tax number must be numbers.

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