Interest income is shown on a 1099-INT, not a 1099-B but to answer your question interest income goes on Schedule B. 

Thanks for correcting my question which should now read:  where do I ]report interest income received on a 1099-int under the business' tax ID #? 

Thanks for correcting my question which should read:  where do I report interest income from a business checking account reported under my LLC's tax EIN number?  On schedule C line 6 under other income as some recommend?  if so how to enter without forcing an override?

A smllc is a disregarded entity. Report 1099 int on sch b