QB Issue Resolution:

In new QBO, you can show discount (percent or $ value) after Subtotal. See attached screenshot photo 1 for reference.

You will need to change discount setting on under Sales form content. See attached screenshot photo 2 for reference.

From the homepage screen, go the company gear (located top upper corner)
Select Company Settings
Select Sales under Settings
Select Discount ON under Sales form content heading
At this point, there is also no option to show discount on a specific product/service by line item. It is only at the Subtotal level. It does calculate discount on subtotal, although it’s placed after sales tax.

NO other additional options available.

Resolution for Issue 'Just converted to the new QBO version and can’t find how to make the discount calculate before sales tax on a default basis. Any help?' available: Yes (Solved).
Source: Intuit Community forum.

Just converted to the new QBO version and can’t find how to make the discount calculate before sales tax on a default basis. Any help?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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