Download the template as below :

Select the view and add column you want to fill in


Once downloaded, fill in the value in excel. For lookup, just give the name of account.

Go to the import from excel button and upload the file



Click on Track Progress to see the procees – it goes from submitted to parsing to transformation and then importing.
The error if any will also appear in failure tab once u open the import job.

Now you can use the same process to create phonecall and link them to leads




Thanks,
Prateek