A pleasant day to you, @Sheppardcody.
Yes, there's a way to review your all your transactions for 2018 in QuickBooks Self-Employed (QBSE). Just click on the drop-down arrow on the Date option in the Transactions page and enter the Custom date for 2018. Don't forget to hit on the Apply button after entering the date range.
I've attached a screenshot below for your reference:
You can also visit the following articles to learn on how you can edit a transaction and add older entries in QBSE:
I'm always up for further assistance. You can find me here if there's anything else you need. Have a lovely day!