How about a Reports > Banking > Transactions with only the Account(s) affected selected and a date range that encompasses the problem? Then sort by dollar amount. That should put all $0 transactions together, allowing for mass deletion.
Click on the column header, that contains the transactions, to sort by that column.
Click on the 1st $0 txn and scroll to select all of them then click CTRL-D
Ok, so you're looking at Tools Menu / Manage Bill & Income Reminders … correct? And that view is cluttered with many reminders, listed with a Status = Done, Amount = 0.00 and possibly the same payee name?
Have you tried Validating and Supervalidating your data file? If not, please do this:
Validate and Supervalidate instructions
First save a backup file prior to performing these steps
Validate:
Super Validate:
If this problem had occurred within the last couple of days my advice would be to restore your Quicken data file from a Manual or Automatic Backup taken prior to the problem first occurring, if necessary going back to older backups until you find a file that does not exhibit these symptoms. Windows: https://www.quicken.com/support/how-backup-or-restore-your-quicken-data
Mac: https://www.quicken.com/support/mac/how-backup-or-restore-your-quicken-data
Once restored you'd have to bring your data file up to date, reentering and/or redownloading any missing or changed transactions.