I've taken our first customer who uses payroll to Sage 100 2018.  Ran the first payroll and the California State Withholding seems to be quite a bit higher when compared to the last payroll they did on Sage 100 2017 with the 2017 Q3 tax tables installed.

Every employee's withholding is higher between version.

To make testing as simple as possible I've got an employee with no deductions.  Just a salaried employee with 2 dependent exemptions, no tax overrides or anything unusual setup in the employee maint.  Employee earns $3000 on a biweekly pay cycle.  On the 2017 version withholding tax calculates at $82.27.  On the 2018 version it calculates $92.75.

I've manually calculated the amount and it really should be $82.27.  The problem with the 2018 version of Sage 100 is that Aatrix provides the tax calculation.  I don't know how to see the tax tables Aatrix is using.

I've contacted support and I'm waiting to hear back from second tiered support.

I'm curious if anyone else has noticed the same issues between versions? 

Bryce