POST /connect/token HTTP/2
Host: preprod-api.myinvois.hasil.gov.my
accept: application/json
accept-language: en
content-type: application/json

{"client_id":[{"_":"<<client_id>>"}],"client_secret":[{"_":"<<client_secret>>"}],"grant_type":[{"_":"client_credentials"}]}

{"client_id":"<<client_id>>","client_secret":"<<client_secret>>","grant_type":"client_credentials"}

client_id=<<client_id>>&client_secret=<<client_secret>>&grant_type=client_credentials

{ "statusCode": 400, "message": "Bad Request" }

did you check it have to be sent as parameter or in header?

By the way, where did you get it? I am still trying to get and try it

POST /connect/token HTTP/2
Host: preprod-api.myinvois.hasil.gov.my
accept: application/json
accept-language: en
content-type: application/json
client_id: <<client_id>>
client_secret: <<client_secret>>
grant_type: client_credentials

POST /connect/token HTTP/1.1
Host: preprod-api.myinvois.hasil.gov.my
Accept: */*
Content-Length: <<variable>>
Content-Type: application/x-www-form-urlencoded

client_id=<<client_id>>&client_secret=<<client_secret>>&grant_type=client_credentials&scope=InvoicingAPI

were you able to submit the invoice? No matter how I try, only get the message: "The authenticated TIN and documents TIN is not matching"

Good day!
Wanna check with you all. How long do you get a reply from myinvois after sending the email requesting for ID and secret?
I have not got any reply after 1 day, and wanna know if that is normal.
If need to follow up, anyone knows how to check with them?
Thanks a lot!

u have to change the supplier TIN to the one u used to register

i have same issue, but using the same TIN not fixed the issue. 

Result: Array
(
    [error] => Array
        (
            [code] => ValidationError
            [message] =>
            [target] =>
            [details] => Array
                (
                    [0] => Array
                        (
                            [code] => submission
                            [target] => submission
                            [message] => The authenticated TIN and documents TIN is not matching
                        )

                )

        )

)

"PartyIdentification": [
    {
        "ID": [
            {
                "_": "<TIN>",
                "schemeID": "TIN"
            }
        ]
    },
    {
        "ID": [
            {
                "_": "<BRN>",
                "schemeID": "BRN"
            }
        ]
    }
]

are you getting this error?
i can confirm that setting the supplier TIN to the one you used to register fixes it

Yup, I can confirm our TIN same as what we registered with IRB, but still having same issue.

case sensitivity maybe? 🤔

Even try to validate TaxPayer's TIN also having issue. You may try from your side, that BRN number is legit.

you have to perform HTTP POST rather than GET
i think you have to get the access token before trying to validate TIN

oh my mistake, validate TIN is using GET
however, you need to pass your access token in the header

yup, the token already passed.

Result: Array
(
    [type] => https://tools.ietf.org/html/rfc9110#section-15.5.5
    [title] => Not Found
    [status] => 404
    [traceId] => 00-e6055bf6f6414f58c4f2f539a4909606-2c3b6779e2a64ed1-00
)

Result:

This is the reply when the TIN is incorrect
This is the reply when TIN is correct