Please refer to the below link to know more abt BSI Tax Factory...
Specific query on US Payroll can be posted on the Specific forum for US Payroll...
All the Best !!
BSI software is mandatory for Tax calculation in US Payroll. US has complex regulations and compliance requirements w.r.t taxes and these undergo frequent changes. Due to the difficulty involved in keeping track of these changes, SAP utilizes the Tax Factory module of BSI to calculate taxes.
Refer notes for Installing the BSI software
1064089-Installing TaxFactory 8.0, but not as an upgrade.
1068271-FAQ: TaxFactory 8.0 Inst./Upgrade Troubleshooting.
BSI- BUSINESS SOFTWARE INC.
BSI software is mandatory for Tax calculation in US Payroll.
BSI TaxFactoryu2122 offers the most comprehensive and cost effective payroll tax solution in the industry. BSI Tax Factory does tax calculations and generates tax wage types along with Tax Authorities and Tax Models maintained in the SAP Payroll module.
Before the SAP Payroll component sends any data to the BSI TaxFactory for tax calculation, the payroll driver goes through a number of steps to determine exactly which taxes will be applied for each payment or deduction wage type. These steps depend largely on how you configure wage types, tax types, tax authorities, and taxability models in the Tax section of the Payroll: USA IMG.
BSI issued EIN(employer identification number) to thier clients.By this number payroll will integrates BSI.BSI connect to main sap system through RFC T CODE IS SM59.
Refer following link to set up BSI tax factory,
This is Kathy with BSI. Please feel free to contact our Contract Admin group for assistance with these types of questions. They can be reached at 877-274-7873 option #4. They can also be reached by email at contractadmin-(at sign)-bsi.com
BSI Support - Kathy