Secure Client Login

Items Available

  • Tax Documents

Documents Area

  • ClientFlow – Allows viewing of tax documents and transferring files between you and Lewis & Knopf
  • Document Presentation – Allows viewing older (prior to 2016) Business Tax Returns and Financial Statements Viewing Document Presentation Files

Supported Internet Browsers and Software

To use web services products, you are in need of the following:

If you are experiencing problems logging in, please contact our office at 810-238-4617



For your protection we have enhanced our Portal Security Features

  • If your current password doesn’t meet the enhanced requirements, NetClient CS will prompt you to update it the first time you log in.
  • Your password will now expire after 90 days. In addition, your password must contain at least eight characters, including at least one uppercase character, one lowercase character, one numeric character, and one special character (such as @, #, or $). You can make your NetClient CS accounts even more secure by creating a password that’s longer than eight characters.
  • After 30 minutes of inactivity, your NetClient CS, Web Employee, and/or Employee Self-Service sessions will time out. You will need to re-enter your login credentials to continue working. Note that processes such as long print jobs will continue during the timeout.

By agreeing, you adhere to the new portal security features.