QB Issue Resolution:

I find it hard to believe you offer a 75% discount. Are you stating that properly? Are you sure you are not asking how to have them pay a Partial Amount, or Progressive, or a Retainer?

Because, yes, you can show the customer anything, but first, we have to better understand what your actual end goal is going to be.

Resolution for Issue 'Adding % discount to each invoice in advance.' available: Yes (Solved).
Source: Intuit Community forum.

Adding % discount to each invoice in advance.: 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.

Support for 75 discount.
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Error Recovery for 75 discount. [Canada]
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