The first and foremost step after installing solution is License Activation.
Here are the steps to activate Auto Tax Calculator license.
Navigate to Dynamics 365 --> Auto Tax Calculator app.
Go to License Registration.
Enter the Details: First Name, Last Name, Company Name, Email, Website, and Main Phone --> Click on ACTIVATE.
If you want to purchase or extend the trial, click on SEND REQUEST --> Enter all details --> Click again on SEND REQUEST and send the email to Inogic.
Here are the steps to complete registration through the ‘License Registration using (.lic) file’ section.
Request .lic file from Inogic --> Save file --> Go to Auto Tax Calculator app --> License Registration --> Click ‘Choose File’ to locate the file with the extension .lic
Select the file --> Click ‘Open.’
Click on ‘Register’ to complete the License Registration.