Depends on your setup, you could do any of these depending on how you want it

CheckboxName.Locked=True
CheckboxName.Enabled=False
CheckboxName.Visible=False

Where to put it again matters on when you want it to fire. I'm assuming you want it to fire everytime the form is opened, and take out the checkboxes that aren't needed. Then I would use the on current event of the form.

Thank you only one think,  in event I click the check box to do the event VB code but I do no found Current Event there is: OnClick, Before Update, After Update, On Got Fucus, On Lost Focus, On Dbl Click, On Mouse Down, On Mouse Up, On Mouse Move, On Key Up, On Key Press, On Enter, On Exit.  Where would be the one?

On Current is a Form event.

I choose OnClick and entered the code:

Private Sub Jan_Click()

    If MonthsAssigned2 = 1 Then
        Jan.Enabled = False
    Else
        Jan.Enabled = True
    End If

End Sub

However I have an error: Run Time Error '13' Type mismatch

If you are disabling the Check Box, how are you enabling it?
What type of data goes into MonthsAssigned2?

Please post some screenshots of your Form (in Design View AND Form View).

I enter the same VB code on the Form Current and have the same error. The debug highlight the:

If MonthsAssigned2 = 1 Then

I am stuck with this can somebody help me.

When the error occurs, and the line "If MonthsAssigned2 = 1 Then" is highlighted in yellow, hover your mouse over "MonthsAssigned2" and see what its value is.  "Type mismatch" error means the data type is wrong for the operation, such as comparing a string to a numeral:

     If "one" = 1 Then ...

The line above will give a "type mismatch" error, for instance.

What I understand is to hover "MonthsAssigned2" at the Debug that is highlighted in yellow.  I did that but nothing pops.

is MonthsAssigned2 the Combo Box (one of the reasons I asked for a screenshot in DESIGN VIEW)?
What is the bound column? What is the Data Type of the bound column?

Hi Leo, when the yellow line appears, go to the "Immediate Window" and type:

     ?MonthsAssigned2

then press Enter.  It will show you the value of MonthsAssigned2.

You can also type:

    ?IsNumeric(MonthsAssigned2)

and press Enter.  It will show "True" if MonthsAssigned2 is numeric.

If the immediate window doesn't show, press Ctrl-G on your keyboard.

Certainly is a combo box and de column bound is the 1. See the image.

The Combo Box is bound to a field in the table called MonthsAssigned2. Is that field a Number or Short Text (check your Table)?

A number!

Evil Access Stuff

Wouldn't surprise me if it's something stupid with the Lookup Value in table.

Can you try changing that Display Control back to a Text Box and see if it lets you set the value?

What is the Record Source of that form, is it the TaskProgramaAMLT or a query? If it's a query could you include an image of what is inside the query?

Actually I just seen you have allow multiple values on as well, do some of these have multiple values? I would get that set back to a text box and get rid of the multiple values too, setup a proper relational table for storing multiple months.

Hi Leo, you have set MonthsAssigned2 as a "multivalued" field by setting the "Allow Multiple Values" to Yes.  A multivalued field is a "set" of several values, which is unlike a single numeric or text value.  You cannot compare a set of values to a single value, and that is why you get the "type mismatch" error.

Once you set "Allow Multiple Values" to Yes, you cannot set it back to No.  You have to delete the field and create a new field that doesn't "Allow Multiple Values."  This is one reason (among many) why many people avoid using multivalued fields, including the experts on this site.