The QR code fields shall be encoded in Tag-Length-Value (TLV) format with the tag values specified in the “Tag” column of the adjacent table in the image below.
The TLV encoding shall be as follows:
Tag: the tag value as mentioned above is stored in one byte Length: the length of the byte array resulted from the UTF8 encoding of the field value. The length shall be stored in one byte. Value: the byte array resulting from the UTF8 encoding of the field value.
This image describe my problem:

You can generate the required hashes by using this library here.
String qrBarcodeHash = QRBarcodeEncoder.encode(
new Seller("شركة تجريبية"),
new TaxNumber("312345678901233"),
new InvoiceDate("2021-11-18T18:40:34+03:00"),
new InvoiceTotalAmount("2.30"),
new InvoiceTaxAmount("0.30")
);