Hi @Mila ,
If the checkbox during the installation was missing, then there is a thread for this:
https://community.jmp.com/t5/Discussions/JMP-14-1-Excel-Add-in-checkbox-missing-during-installation/...
If the checkboxes were choosen during installation then maybe you can check in your excel
File > Options > Add-ins > (at the bottom) Manage: "COM Add-ins" > Go... > tick the JMP checkboxes > OK
if it still doesn't appear check: File > Options > customize Ribbon > tick JMP on the right side > ok
then it should appear at the top of excel
I hope this helps you.
BR,
Marcus