I am trying to test a API to create a company but it gives me a assertion error, it says that i need to create a custom .create() method but I have already defined that but still getting the error.

serializer.py

“`python

class TaxInformationSerializer(serializers.ModelSerializer):
    class Meta:
        model = TaxInformation
        fields = '__all__'
    def create(self, validated_data):
        return TaxInformation.objects.create(**validated_data)

class CompanySerializer(serializers.ModelSerializer):
    tax_information = TaxInformationSerializer()



    class Meta:
        model = Company
        fields = ["brand_name", "legal_name", "mobile", "telephone_no", "fax", "status", "tax_information"]
        read_only_fields = ['user', 'created_at']

    def create(self, validated_data):
        # Automatically set the user to the request user
        request = self.context.get('request')
        if request and hasattr(request, 'user'):
            validated_data['user'] = request.user
        return super().create(validated_data)

        # Create the tax information instance
        tax_information_data = validated_data.pop('tax_information')
        # tax_information = TaxInformation.objects.create(**tax_information_data)
        tax_information_serializer = TaxInformationSerializer(data=tax_information_data)
        tax_information_serializer.is_valid(raise_exception=True)
        tax_information = tax_information_serializer.save()

        # Create the company instance with the tax information
        instance = Company.objects.create(tax_information=tax_information, **validated_data)
        return instance

and the error is

AssertionError at /datamanagement/company
The `.create()` method does not support writable nested fields by default.
Write an explicit `.create()` method for serializer `datamanagement.serializers.CompanySerializer`, or set `read_only=True` on nested serializer fields.

 I have already defined a custom create method but still getting the error.