I was able to successfully clear the error by doing the following:
1) go to 1099-B entry in Income
2) find the specific sale flagged as an error
3) IMPORTANT - delete the number in the Wash Sale box, leaving it blank, and then uncheck the box that shows additional fields. Unchecking the box without first deleting the Wash Sale field does not clear the error
4) save and repeat for each sale
