Withholding Tax Reporting - One-Time Vendors (Venezuela)

Taxation Gurus,

I have a client that needs to generate standardized reporting on withholding taxes in Venezuela for all of their vendors (including one-time vendors). The current process for regular vendors is to use transaction S_P00_07000134 to assign Withholding Tax Certificate Numbers and generate an outuput using a Standard SAP Smartform (FISF_IDWTCERT_VE_04).

The problem is that Withholding Tax Certificate Numbers are not being assigned to invoices for One-Time Vendors (Vendor Account Group "CPD" - One-time vendor internal no. assignment) and so we can't report on these as you can see by the attached screenshots.

Any idea how Withholding Tax reporting is normally handled for one-time vendors?

Thanks,

Jason