Sets/returns the Employer's workplace ZIP Code.
value = object.getCompanyZip()
|object||A TaxControl object|
|value||A numeric variable/expression|
In order to use the TaxNamesForZip method, the employer should specify the Zip Code for the main workplace. This is because withholding rules for some jurisdictions are determined by whether or not the employer is "in-state" (that is, based within the jurisdiction).