1099 Generic Withholding Tax Reporting RFIDYYWT program

Hello SAP Gurus,

For US 1099 withholding, does anyone know what the fields for US company codes in transaction OBY6 > Additional details should be filled with and what they represent or how they are used? Is it the company code's Tax ID number (TIN)?

Withholding Tax EDI Referen.No

Withholding Tax Reference No.

Thanks,

Linda