I've never used it,  is it a separate product, or a built in feature that you get access to once youve paid for it?  I thought it was a built in add-on, not a separate download.

I think you just need to update your licensing   TOOLS > License Product then follow the instructions for using it here

https://accountants.intuit.com/support/en-us/help-article/form-1040/importing-scanned-source-documen...