It's hard to follow what all you are doing, since you have 3 threads on this 1099-INT issue and are jumping around from thread to thread, which leads to redundancy and confusion..
Are you wanting to get rid of all Forms 1099-INT? If so, here's another way:
With your return open, in the left menu column, click on TAX TOOLS, then TOOLS.
In the Tools window, choose "Delete a form."
That will bring up a list of all forms in your return.
Look for any that say "Schedule B - Form 1099-INT (institution name) or may say "untitled."
Delete the ones you don't want.
Don't delete the actual Schedule B since it may have dividends and other items on it. If you delete the Schedule B itself, you'd have to re-enter your 1099-INT, 1099-DIV, 1099-OID, interest from K-1, etc. so that it would generate another Schedule B.