Linking Cells with Check Boxes

See Attachment.

On the complaints table tab row 9 I have set up a formula to count the amount of complaints received in each month. That row will be hidden with row 8 picking up what is being shown in row 9.

For the months where there are no complaints, i want to be able to tick the check boxes, and once they have been ticked a zero will appear in the blank cells in row 8.

Thank you for any help you are able to give me. Cheers!!