How to invite employee to login to add bank information and social security number?

Hi! I need my independent contractors to be able to login to their account and add only their social security number and bank routing and account numbers. How can I set up where they can login and only add those 3 numbers?

Sorry that these fields currently can only be updated by Employer.

Thank you so much for your quick reply!

  1. Where can I store an Excel Spreadsheet?
  2. Do you know a tool I can use to collect the information easily from employees?
  1. Sorry, what do you mean with:
  1. I have no idea yet, but you may Google for such tools.