Yes, your members/parents can upload forms to BoosterHub. There are two ways to do this. 

• First, forms can be uploaded directly. In the web version of BoosterHub, Admins can go to File Manager > + Upload File > Select File > Upload. You can make a file or folder viewable by Admins Only, Admins & Members, or Public by clicking on the three dots at the far right of the row of the file name. If you are looking for them to upload health forms or other sensitive documents, you can have your members upload files, then an Admin can put them in a folder viewable by Admins Only. On the app version of BoosterHub, your members will go to Dashboard > Files and then click the big, blue + icon on the lower navigation menu. They will then select either Upload File or Upload Photo, choose a file, and select Open.
• Second, you can have a Store item that is simply a forms upload vehicle. Create a folder in your file vault and set it to Admins Only. Then in the Store, create a Product and use the Add-ons feature to create the upload portal by selecting Buyer uploads a file from the Type dropdown menu. You can either include the upload with another product (such as tying it to club fees), or it can be a stand alone product set to a price of $0, like this one: https://bh.boosterhub.com/store/1870/11956

You will then have a folder for your club's forms accessible by Admins even from the app.