Trying to make it active requires moving the key information to the end of the sentence:
"The time you spent in training last year entitles you to jump pay [for that time]."
Although style guides like this one usually advise against using passive voice because it makes things harder to read, clarity should be the goal, not just active voice. This is a good example of a reason you might prefer passive voice: because the verb's subject isn't the focus. Passive voice can also be clearer than active voice when there's no relevant or meaningful actor to use as the subject.
That is active voice, but subtly changes the meaning. “Deserve” suggests non-binding moral qualification, “are entitled to” suggests binding legal qualification. “You earned jump pay for...” is closer.
Honestly, though, this is a case where the usual purpose of active voice rules (to avoid deenohasizing or obscuring responsibility) is not actually frustrated even though the sample is in passive voice so while I wouldn't use it as an example of active voice I wouldn't necessarily avoid it even given an avoid-passive-voice guideline. (And I've reviewed documents under publication manuals with such guidelines.)
In another thread, I got to: "Applicable regulations entitle you to jump pay for the time you spent in training last year." For the passive reading I think that's the correct active version.
"The time you spent in training last year entitles you to jump pay [for that time]."
Although style guides like this one usually advise against using passive voice because it makes things harder to read, clarity should be the goal, not just active voice. This is a good example of a reason you might prefer passive voice: because the verb's subject isn't the focus. Passive voice can also be clearer than active voice when there's no relevant or meaningful actor to use as the subject.