Using a checkmark to add value to a cell - excel

Question

im trying to create a macro for adding text to a field
i want when i click the checkmark to add a specific text to a case
i have 8 checkbox each one will add a different text to the same case
right now my code look like this
Private Sub CheckBox1_Click()
If Me.CheckBox1.Value = True Then
Range("A56").Value = "Test"
Else
Range("A56").Value = " "
End If
End Sub
the problem is if i check 2 checkmark it always replace the text and i want it to add the text not replace it. and also when i uncheck the checkmark it remove everything in the case
the reason why i need it is to save time not having to write them manualy each time
i am very new to excel coding i apreciated any help you guys can give me
thanks a lot for ur time

Answer 1

So the first part:
Range("A56").value = Range("A56").value & " Text"
The second part I'm assuming the real entries are more substantial than "Test" otherwise you might get some false positives, but this should work pretty well:
Private Sub CheckBox1_Click()
With Sheet1 'Change this to the proper sheet codename
If Me.CheckBox1.Value = True Then
.Cells(56, 1).Value = .Cells(56, 1).Value & " Testing"
Else
If InStr(1, .Cells(56, 1).Value, " Testing") Then
Dim splitarr As Variant
splitarr = Split(.Cells(56, 1).Value, " Testing")
Dim element As Variant
.Cells(56, 1).Value = ""
For Each element In splitarr
.Cells(56, 1).Value = .Cells(56, 1).Value & element
Next element
End If
End If
End With
End Sub
You might want to make the entered or deleted string a variable so it is easier to change.