1. Make a samba group

sudo groupadd smb

2. Add samba user

sudo adduser --no-create-home --disabled-password --disabled-login sambausername

3. Add user to the smb group

sudo adduser sambausername smb

4. Add samba password

sudo smbpasswd -a sambausername

5. Re-start Samba

sudo service smbd restart

Now you can add printer from remote computer