First make sure your user rights are setup and not restricted to read only in QuickBooks or your network software.

You can delete records from QuickBooks, but you must be in single-user mode using the QuickBooks company file. Also, QuickBooks must allow you to delete records - see our Schema document for details on each file to see if it is possible to delete records from it.

In addition, certain tables have child records that must be saved at the same time as the parent or header record. The child tables are listed below following the name of the parent table:

Bill: BillExpenseLine, BillItemLine, BillLinkedTxn
Invoice: InvoiceLine, InvoiceLinkedTxn
Check: CheckExpenseLine, CheckItemLine
CreditCardCharge: CreditCardChargeExpenseLine, CreditCardChargeItemLine
CreditCardCredit: CreditCardCreditExpenseLine, CreditCardCreditItemLine
CreditMemo: CreditMemoLinkedTxn, CreditMemoLine
Host: HostSupportedVersions
Estimate: EstimateLine
ItemGroup: ItemGroupLine
ItemSalesTaxGroup: ItemSalesTaxGroupLine
JournalEntry: JournalEntryDebitLine, JournalEntryCreditLine
PurchaseOrder: PurchaseOrderLine
ReceivePayment: ReceivePaymentLine
SalesReceipt: SalesReceiptLine
VendorCredit: VendorCreditExpenseLine, VendorCreditItemLine, VendorCreditPaymentLine