Welcome to the Community, @susan173!
If you want to reorder the products or services on your invoice, you'll have to remove and re-enter each item per line. To help you manage your invoices better, you can refer to this article: Create invoices in QuickBooks Self-Employed.
Additionally, if you need to categorize your transactions, you can find guidance in this article: Categorize transactions in QuickBooks Self-Employed.
If you have any other concerns besides reordering line items on your invoices, feel free to leave a reply. The Community is always eager to help.