Sage BusinessWorks 2015 Service Pack 7 question

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Hi Kim or Payroll Question Answerer!

One of my clients has hundreds (and hundreds and hundreds...) of employees.  She finally printed her W-2s for them last week (from an archived company).  She has yet to e-file the official forms to the UST.  Is it okay to install service pack 7 with the new tax tables?  Or will that mess up the official W-3 and W-2 for the Feds?

Can you believe after all these years using BW this question has never come up for me?  Most of my clients are trained to get those W2s out before the first payroll of the new year.  Oh, well.  Live and Learn!!!

Thank you!!

Vicky Schroeder