Where do my forms go?

I am creating a donation form to be connected to an inventory sheet for a very small food pantry that I volunteer at.

The donation form will have the donator’s name, contact information and a line for each item type of item in their donation. The items will populate the inventory sheet.

I think I have a handle on connecting the form to the inventory, but where does the form “go” afterwards so that I can bring it up again if necessary? Do I need to keep the donation forms in the workbook to keep their information in. The inventory sheet?