• Another transaction is associated with it
• The transaction is in a closed year
• Damaged transaction

1. Delete related transactions

1. Open the transaction you wish to delete.
2. Click View Related Transactions.
3. Double-click on the transactions and delete them.
   • A related transaction can have other transactions related to it: you'll need to delete these, too
   • Ignore any transaction if the Transaction Type states Amount Paid at Sale
4. Once you’ve deleted all associated transactions, you can delete the desired transaction. 

2. Transaction in a closed year

• If the desired transaction or a related transaction is in a closed year, you can't delete it
• Use reverse entries to cancel it out, or restore a backup

3. Correcting a damaged transaction

1. Run a journal sync test.
   • If it's an Accounts Payable transaction, run the Vendor/Journal Sync test
   • If it's an Accounts Receivable transaction, run the Customer/Journal Sync test
2. Run the Invoice/Payment Sync Test.
3. Verify that you can now edit or delete the invoice.