Remove shared access to a Reckon One book
Login to the Reckon Portal
On the left-side navigation select My Products and then Reckon One.
For the specific book that you want to interact with, click on the 
three vertical dots
Select Share with... then select User
Click on the
View current shares link
For the specific user that you want to remove access for, click the
three vertical dots button then click the
Unshare button
Repeat the process for any other users you want to remove access for
