You can delete expenses entries in CORE using the below steps:  

1. Open the Expense Entries screen in CORE and select the entries to be deleted.
2. Click Actions > Delete.
3. To delete a single entry only, you can use the row action menu instead and click Delete.

However, you cannot delete an expense entry in the following cases:

• If it is associated with a vendor bill, invoices or payroll
• If it has already been billed or marked as ‘Billed’
• If you cut a check for that expense in the Write Checks screen
• If you assign a credit card to an expense entry in the Expense Entries screen. You need to first unlink the expense entry from that transaction.
• If your company has the DCAA compliance applied in Global Settings
• If you do not have permission to delete expense entries as per your security settings
• If it falls out of the set date range specified in Global Settings > Time & Expenses
• If it falls beyond the company's closing date