QB Issue Resolution:

The only way to do it would be a service item for the adwords, qty and rate, the description would need to say something about it being noted but not charged

Then another service item, qty = -x (negative qty same as the adword qty), and the same rate amount, the description would have to say something about this item removing the charge from the customer invoice total due

both items set to non taxable

Resolution for Issue 'Digital marketing campaigns and co-op adwords invoicing' available: Yes (Solved).
Source: Intuit Community forum.

Digital marketing campaigns and co-op adwords invoicing: 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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