In the sales invoice section, it shows record 601 -674 of 674. i need to see record of 674. can I refer to those after 674?

I have a simple way on how you can locate the current invoices you made, beltco.

QuickBooks Online (QBO) has a feature wherein you'll be able to see all your invoices from previous to current period or vice versa. You can click arrow on the No. heading column to sort out all your invoice. I've added a screenshot for your guide:

Once you're able to sort out from the current down to previous invoices, it easier for your to locate the one you're looking form. Aside from that, you also have the option to filter your invoices so you'll be able to find the items that you need. For more information on how this works, take time reading this article for your guide: View Sales Transactions. 

Furthermore, once your customer pays the invoice, you'll may need to receive the payment by grouping deposits in Undeposited Funds. To learn more on how this works, check out this available resource: Receive Payments. 

Feel free to let me know if you have any concerns about invoices. Please know, we're always right here if you need further assistance.