How can I insert a link to my upload into the form?

Hello! Is it possible to upload files to JotForm that can then be linked in a form? For example, I would like to have a "Click here for your event invitation." The click here would then link to the file I uploaded to JotForm.

As far as I see you have handled this with your RSVP Template form. The text field is able to contain some HTML codes. So it is useful in such cases.
Please contact us if you have any other questions. 

Thanks Alan. I am considering switching from FormSite to Jorform. On FormSite there is a Files & Images/Upload Files feature that enable me to store PDFs, JPEGs, etc. Here's a sample link: https://www.wwuevents.com/rsvp/images/01-28-19_MEC_INVITE.pdf

I am trying to find out if Jotform has a similar feature (perhaps for paying plans?). Ideally I would be able to upload files to Jorform, then link to specific files on my forms. Hope his makes sense.

I recommend you create a form which includes upload field for your uploads. You can upload your files by submitting the form. And then you can get the URLs from submissions page.  Please note that these uploads will affect your upload limit. Please see this article for more information about the account limits. 
Guide: Understanding Your Account Usage and Limits
And also you can directly upload your jpg, jpeg, gif, png, pdf files via this link.

Thanks Alan. Your reply included "And also you can directly upload your jpg, jpeg, gif, png, pdf files via this link". I uploaded a PDF using the link provided, but cannot seem to find the uploaded PDF. Where would I look for/locate the PDF?

This is our public upload page. The files are not collecting under a specific folder. You should get your URL right after the upload completed.