'Can I autofill a form when redirecting from another website?

I have a website that handles donations to a club. The only way, however, to donate to the club, is through another website (the school website which I do not have access to). I sort of have two questions:

  1. The school website has a query string. The only one I currently know of is ?fundDestination=[schoolname]. I want to be able to know all of the possible query strings so that I can input the correct amounts and the correct destination. Is this possible? If this is not possible, then maybe I can use question 2.

  2. Is it possible to edit a website's input values while redirecting to it? I want to be able to have the values autofilled while redirecting.

Some extra information:

I know this website uses jQuery.

If you want access to the website, it is https://vsb.schoolcashonline.com. The specific link (without the query string) is https://vsb.schoolcashonline.com/Fee/Details/1869/196/false/true



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