Hi there, biserka-zufic.
After you unblocked the cookies, I suggest clicking the Back button to return to the login page and re-enter your credentials. This let's the system to recognize that the cookies are enabled.
If the issue persists, I recommend logging in to your account using a different browser. The error may have been caused by too much data saved in your browser. Thus causing the program to not work properly.
Once you have an activated payroll, please check this article on how to start adding employee: How to set up an Employee in QuickBooks Payroll. This article also provides on how to enter details of your employees.
Please know that you're always welcome to post if you have any other concerns. Wishing you and your business continued success.
