Prior versions would require creating a copy of the live company prior to closing the quarter. You would then need to run the reports out of the copy company since closing the quarter would empty the monthly information required for the quarterly reports in the live company.  

  This is no longer required.     Sage 100 will allow you to process payroll to a future quarter if the current quarter has not been closed ( version 2018 and higher ). Payroll uses the check date as the posting date. The best practice is to perform Period End Processing at the close of each quarter. It is also important to do Year End Processing  before  processing payroll for the new year as Period End Processing/Year End Processing does specific thing to Time Off Accruals, YTD values in Direct Deposit, Deduction balances are reset, etc. See link in Related Solutions for details     

        To process Payroll in a future quarter that is not at Year End, ensure that  Role Setting  is enabled for “Allow Out of Quarter Check Date in Payroll Data Entry”.

1) Go to Payroll/Main/ Payroll Data Entry and enter Pay Cycle information. You will get a warning message “Warning! Calculated pay period ending date, X/X/XXXX is not in the current quarter in Payroll Options. Do you want to continue?” due to the period ending date. Click yes.
2) Enter check date. You will get another warning message “Warning! X/X/XXXX is not in the current quarter in Payroll Options. Do you want to continue?” due to the future check date. Click yes then click OK.
3) Enter Payroll Date Entry info for employees.
4) Run Payroll Tax Calculation.
5) Review/Print Payroll Data Entry Audit Report, Employer’s Expense Report, etc.
6) Print Checks/DD stubs.
7) Update Check Register.
8) Update the Daily Transaction Register.

Your checks will have posted to the future quarter. When you are ready to perform Period End 

How to Perform Quarter End and & Year End Processing in Payroll 2.x