"I can't post follows on the original topic here:"

There is no previous topic with your username, on this community forum. You don't want to post on old topics. T he regulations change. The program functions change.

The W9 is not the right question. That's the form you send to customers.

"In my case it was a MMLLC with a S-Corp election. Then it changed to a SMLLC (taxed as a sole proprietor)"

Here:

https://www.irs.gov/businesses/small-businesses-self-employed/do-you-need-a-new-ein