Hello TRBurns,

Thank you for posting here in the Community. I'd be glad to help provide clarification about the Profit and Loss report in QuickBooks Online.

When you run the Profit and Loss Comparison report and comparing them to the previous period, the basis here are the days from the current month. Since April only consists of 30 days, it backtracks another extra day to match your report from May 2019.

For additional insights into running reports, such as the profit and loss statement, I'm adding the support links I recommend:

• Understand the profit and loss statement.
• Targets vs. Sources overview.

I look forward to serving you to the best of my ability, so please don't hesitate to reach out to me regarding the reports. The Community is always available anytime.