Payroll is spread equally over 24 payrolls beginning in July for all 12 month employees, and the first pay in September for all 10 & 11 month employees.
Pay is generally the 15th and the last day of the month depending on when these fall in the week. To see the specific date review the FY23 Pay Dates and Time Sheet Pay Schedule
A new W-4 must be filled out any time you want to change your withholdings. If you want any additional taken out of your check or different withholdings for state taxes, you must fill out a W-4 MN as well.