How to directly send AP scores to UMD on test?

I know how to send the scores through college board but I heard you can send them free somehow by filling in something on an AP test. I’m taking AP tests this May and I have two questions. How do you send the scores and can u send scores from previous years using this method(for free of course).

@DDOuser - You can send them free for the upcoming May tests. I believe it’s similar to the way free SAT scores are sent. You fill in the UMD college code, probably on the first page or front cover of the test. I’m sure the Proctor can explain it when the time comes.

I seem to recall that I had to pay to send the tests from previous years.for my D.