you can create a tax that is scoped to the entire order without adding it to each line Item. For example:
{
"idempotency_key": "random_uid",
"order": {
"location_id": "{{location_id}}",
"taxes": [
{
"scope": "ORDER",
"name": "order tax",
"percentage": "2"
}
],
"line_items": [
{
"quantity": "1",
"name": "Burger",
"base_price_money": {
"amount": 200,
"currency": "USD"
}
}
]
}
}