Userform Textbox to populate with

Hi. There's a couple of Userforms i'm working on that appear one after the other, but which I'm having problems with. Hopefully someone can help.

Userform1 is a basic search and find using the text the user enters in a text box, followed by 'ok' commandbutton.

If a matching cell is found in the worksheet, the row is selected and the second userform asks for text via textbox2. This text will be placed in the end column of that row (column L) that was found to have the text input in Userform 1.

What's important is that if on that row some text already exists in column L, that this appears in textbox2 allowing the user to modify it.

I'm ok with the search and find :

Private Sub Commandbutton1_Click()
    Cells.Find(What:=TextBox1, After:=ActiveCell, LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, MatchCase:= _
        False, SearchFormat:=False).EntireRow.Select

But can anyone help with how I do the rest?

Jules