There are several ways to do it,
Create a class that is called Data and in the public class Data you will add some variables in this way
public string Orden {get; set;}
public string Descripcion { get; set; }
These variables will receive the parameters
in your main form where you will have the txtbox you will send the content to the data variables as follows
ReportV c = new ReportV();
Datos dat = new Datos();
dat.Orden = (string)this.txtbox1.Value;
dat.Descripcion = (string)this.txtbox2.Value;
c.Datos.Add(dat);
}
c.Show();
In the end it is to add some cells in the report viewer and add the variable of the data and you can generate it and export it to PDF, EXCEl and others.
I hope it serves you, regards