Place the cursor where you want the tick box
Go to the Home tab
Click the Bullets drop-down arrow
Select the tick box bullet style if available
If not available, go to Insert
Click Symbol
Choose More Symbols
Select a check mark or box symbol
Click Insert
To create a clickable tick box, go to the Developer tab
Click Check Box Content Control
If the Developer tab is hidden, go to File
Click Options
Select Customize Ribbon
Check Developer
Click OK
To add multiple tick boxes, copy and paste the inserted box or control
To change a tick box into a checked mark, click the box or symbol and replace it with a check mark symbol