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Let me guide you on how to run a report for 2019 by category in QuickBooks Online (QBO), benb-irp.
We can run Transaction Detail by Account report and customize it by category in the Distribution Account field.
For more details about customizing your reports, just check out this article: Customize reports in QuickBooks Online.
I have a link that provides you insights about running reports: https://quickbooks.intuit.com/learn-support/en-us/reports/07?product=QuickBooks%20Online.
Keep me in the loop if you need a hand with creating recurring transactions or any QBO related. I'm glad to help. Have a great day ahead.