When a client is synching Vendors (created in SCM) to Intacct, they are adding in the Gov/Tax ID expecting it to sync in with the rest of the information put into the company. Once the Vendor is created in Intacct, it will leave off the Tax ID section in the Vendor's "Additional Information" tab. These are two fields that represent the same information and should be able to link.
We suggest maintaining the Gov/Tax ID in your ERP or Accounting app, not in SCM. We have heard the requests however, and this is planned in the future.
Yes this was a hot issue when customers were filing 1099's last month