Request:
POST https://quickbooks.api.intuit.com/v3/company/9130347284373276/invoice?requestid=b0b05268-0f7c-a424-11f8-f0d58691c21e&minorversion=38 HTTP/1.1
Content-Type: application/xml
Authorization: Bearer eyJlbmMiOiJBMTI4Q0JDLUhTMjU2IiwiYWxnIjoiZGlyIn0..tXfeALAjWRvGCcsBmzmrVg.sLSEHmcTXod8HuC7lLX8Gap1NnfFgDsq8YWwV-UD7z2vyIsz7iI7KT2Z5aS0WUq2GFi_qIYVU68-DPpEUx1aDJ4kbIjn3kZn-BBAxQsDXO-EibLlI6gnm8pWjK60fzmMYUpqnKX-eaQTNkTtoyLRh5_I9v6i59eSpxkBHGrEp_A0vO6F_OlC9zhHUq5jLlIg0ewMwXdlqD5OCiw6d-_xvpruvG0R_Nh2H3xJnFuif-ifSkOWh_61mpdheOuvKr_7vyJWP5VCe_CdzIWw6JwRRsOJvQHZxxzcefGsHDBwp-tDkm5VDIOGEspger3ZliVuPxUSKwqwz6V0wDBZLMw7z9XwY4T5VdHRC-e2vcwW_gJCyKCRNgxDiyBA-Eg80tfGZxGUbaetNE0iXGQum3WEjIc3JWC6cSPqFZlswQrBz-_c7s8-gO6WLr3T1EhWvIL3xZuk47jmg3u3HnCJg1Ncr3HRRJ6R6QO0fMTcfOgYO1qHUw-bACxC86J5WffNxXPjYqw3CzFwybKnSCygT9EBfdG5Io3u6Rtd4fLK69B-HUsHDCS9gaGgNPWYP2FLzJ8ebRQKofeyrE3An2PJNsmABz3JePubJ18DBPHJPDYzQERBEd8YIpy6RbwP0HzLxRa4a37oLEzmLOmTuZrXkoweXpXnEm1SIUcTEOa0_v4D2OsU0pPE1tiWac5Bp5OCeNepTcki_mZbadZHrUqiv3FJ1wucNhzIxyJbG0WaCD-2gFM.jhvo8OqF3Va1mmQQ7HOTZg
Content-Length: 2210

<Invoice xmlns="http://schema.intuit.com/finance/v3">
	<DocNumber>WA480534</DocNumber>
	<CustomerRef>251</CustomerRef>
	<TxnDate>2021-04-20</TxnDate>
	<DueDate>2021-04-20</DueDate>
	<Line xmlns="http://schema.intuit.com/finance/v3">
		<Amount>703.2</Amount>
		<DetailType>SalesItemLineDetail</DetailType>
		<Description>A253494 PLATINUM 458BK PROPHECY GLOSS BLACK 18X8 5X120  ET35</Description>
		<SalesItemLineDetail xmlns="http://schema.intuit.com/finance/v3">
			<TaxCodeRef>NON</TaxCodeRef>
			<ItemRef>51723</ItemRef>
			<Qty>4</Qty>
			<UnitPrice>175.8</UnitPrice>
			<ServiceDate>2021-04-20</ServiceDate>
		</SalesItemLineDetail>
	</Line>
	<Line xmlns="http://schema.intuit.com/finance/v3">
		<Amount>0</Amount>
		<DetailType>SalesItemLineDetail</DetailType>
		<Description>Shipping & Handling</Description>
		<SalesItemLineDetail xmlns="http://schema.intuit.com/finance/v3">
			<TaxCodeRef>NON</TaxCodeRef>
			<ItemRef>51723</ItemRef>
			<Qty>1</Qty>
			<UnitPrice>0</UnitPrice>
			<ServiceDate>2021-04-20</ServiceDate>
		</SalesItemLineDetail>
	</Line>
	<BillEmail xmlns="http://schema.intuit.com/finance/v3">
		<Address>alferatovic@gmail.com</Address>
	</BillEmail>
	<BillAddr xmlns="http://schema.intuit.com/finance/v3">
		<Line1>Almir Feratovic</Line1>
		<Line2></Line2>
		<Line3>251 W 89th street Supt</Line3>
		<Line4>Superintendent</Line4>
		<City>New York City</City>
		<Country>United States (US)</Country>
		<CountrySubDivisionCode>NY</CountrySubDivisionCode>
		<PostalCode>10024</PostalCode>
	</BillAddr>
	<ShipAddr xmlns="http://schema.intuit.com/finance/v3">
		<Line1>Almir Feratovic</Line1>
		<Line2></Line2>
		<Line3>251 W 89th street Supt</Line3>
		<Line4>Superintendent</Line4>
		<City>New York City</City>
		<Country>United States (US)</Country>
		<CountrySubDivisionCode>NY</CountrySubDivisionCode>
		<PostalCode>10024</PostalCode>
	</ShipAddr>
	<DepartmentRef>1</DepartmentRef>
	<ClassRef>1800000000000157375</ClassRef>
	<TxnTaxDetail xmlns="http://schema.intuit.com/finance/v3">
		<TotalTax>0</TotalTax>
	</TxnTaxDetail>
	<ApplyTaxAfterDiscount>1</ApplyTaxAfterDiscount>
	<PrintStatus>NotSet</PrintStatus>
</Invoice>

Response:
HTTP/2 400
date: Tue, 20 Apr 2021 16:53:49 GMT
content-type: application/xml
content-length: 539
server: nginx
strict-transport-security: max-age=15552000
intuit_tid: 1-607f071d-3fa093890a5542613eb31487
x-spanid: aeaff05d-3b52-4b3b-9834-fa4a451a7269
x-amzn-trace-id: Root=1-607f071d-3fa093890a5542613eb31487

<?xml version="1.0" encoding="UTF-8" standalone="yes"?><IntuitResponse xmlns="http://schema.intuit.com/finance/v3" time="2021-04-20T09:53:49.155-07:00"><Fault type="ValidationFault"><Error code="6000" element=""><Message>A business validation error has occurred while processing your request</Message><Detail>Business Validation Error: Were sorry, QuickBooks encountered an error while calculating tax. Try reselecting the tax rate or reentering the product/service item and saving the form again.</Detail></Error></Fault></IntuitResponse>