You are running the Deposit Summary by Period end date.

You are combining multiple data folders and have an employee who has checks in both data folders, but exists in only one of them.

You have voided and not replaced a check from another quarter into this quarter for an employee with no earnings in the reporting quarter.

Run the Deposit Summary by Check Date. Aatrix reports are accumulating amounts by Check Dates, not Period End Dates.

When you move an Employee from one data folder to another and you are merging your files and reporting under one FEIN, move all checks for that employee into the correct data folder. Do not have checks for this Employee in both Merged files.

If you have voided a check into a quarter for an employee who didn't work in the quarter, you'll have negative amounts in this quarter. Aatrix will ignore the negative values. You will need to manually change the Aatrix 941 report. Use the Deposit Summary in order to ensure correct totals. Deposit Summary must be run by Check Date.