How to connect your FTP using TLS authentication in Filezilla:
Open Filezila --> Then Open site manager -->Click on "New Site" --> Give the details shown in the below picture.
After giving the details click on the "Transfer Settings" tab and then choose the Transfer mode. Transfer mode should be "Default" or "Passive".
Then Click on connect. Once you click on connect, it will ask for the certificate. The certificate page will come. Click on ok to accept the certificate.