You cannot delete invoices/receipts from the archive yourself.
If the invoices/receipts is still in Purchase Invoices (purchase invoice, travel invoice, and bank statement), you can return the invoice from the Archive to the Purchase Invoices, and the receipt will be deleted from the Archive. The return is done on the Purchase Invoices side. Read more about returning the invoice from the Archive here.
If necessary, Heeros application support can delete receipts (sales invoices) from the Archive upon request.