Adding a special tag on incomplete payments for Infusionsoft?

Finally, is there any way to set a special tag in Infusionsoft via integration ONLY for incomplete transactions ? 

I'm sorry, unfortunately I do not have an Infusionsoft account to test that.

I believe incomplete payments won't trigger the Infusionsoft integration, unless you marked them as "Complete" in your submissions page.

Do let us know if you need more information on this.