First you need to go to the website of the Estonian Tax Department https://www.emta.ee/
Click Sign in to EMTA in the top right corner.

Log in with ID card.

Then choose your company from the proposed list (it is important not yourself, but the company)

In the left menu column, select
settings > permissions > delegate permissions > new permission

Next, in the column Personal or registry code, enter 14649069 > Search

The system will find LKS Consult OÜ > click Next

Check the switch Delegable - must be enabled (normally enabled by default)

Further below you need to select the granted rights.
In the Scope column, select Taxes, click SEARCH

And there will be offers of rights related to taxes
Select Accountant's Package and click Add