Uploading multiple forms using excel

Hi,
When we design our forms in commcare, we use every form as one section. So
for example, household profile will be 1 form and demographic details will
be another form. We were trying to design the same using excel file and
uploading as xml code. However, we are unable to find an option wherein we
can upload using the same file and multiple sheets. Please share if it is
possible and how.

Thanks,
Prachi