Yes, you can. In navigation bar under contact tab you will find an option stating "+Add contact" on the right-hand corner. Fill in the required information and click on submit. Note: If you have mandatory fields in your contacts then please fill them ...
1. Only when you want to import a contact along with a tag or add a tag to an existing contact, you can use simple import. 2. When you want to add custom additional field values, then you can use advance import contact