How can I add comment tab like this in my doctypes?

[mohamed_prosepra]

How can I add comment tab like this in my doctypes ?

[NCP]

Reference: Can we create activity tab in RSV (Required site visit) doctype - #2 by NCP

[mohamed_prosepra]

what are the fields should I create in my doctype ?

[NCP]

Again, read the whole post.

Can we create activity tab in RSV (Required site visit) doctype

I provided the reference of the activity tab and how it worked in code, now you have to add the activity tab and configure the logic.