I can think of one possible reason for these payroll liabilities. Let me help you.
If you process the payment outside the system, make sure to record it on QuickBooks Desktop. Go to the Employees menu, hover over Pay Taxes and Liabilities, then select Pay Schedules Liabilities.
Though you paid the first quarter taxes, there are still payroll liabilities showing if you run payroll for a different quarter, let's say for the second quarter. We can verify it by running the Payroll Liability Balances report. Follow these steps:
Go to the Reports menu. From the Employees & Payroll, select Payroll Liability Balances.
Click the Customize button. From the Display tab, set the date from January 2021 to April 2021.
From the Filter tab, search Payroll Item in the Filter.
Under the Payroll Item drop-down, you can select the payroll items you want to include in the report. Make sure to add the SUI.