This season just became that much more important for Immanuel Quickley.

The young guard will become a restricted free agent, after the Knicks and Quickley’s representatives were unable to come to terms on a rookie-scale contract extension by Monday’s 6 p.m. deadline.

So, Quickley could really cash in — with the Knicks or someone else — if he follows last year’s breakout campaign with an even better season.

Perhaps the offseason addition of Donte DiVincenzo gave the Knicks pause, since they now have a glut of guards on the roster.

They still will be able to match any offer Quickley receives on the open market next summer.

Ultimately, he’s betting on himself.

A first-round pick (25th overall) in 2020, the 24-year-old Quickley is coming off by far the best season of his young career.

He emerged as a key piece for the Knicks last season as the Sixth Man of the Year runner-up to Malcolm Brogdon.

Quickley set career-highs in scoring (14.9), rebounds (4.2), steals (1.0) and field-goal percentage (44.8), helping the Knicks enjoy their best season in a decade.

He was one of their best two-way players, their leader in defensive rating (108.1) and third in NET rating (plus-6.2), as the Knicks outscored the opposition by 6.2 points per 100 possessions when Quickley was on the floor

He struggled in the postseason, before suffering an ankle injury in Game 3 of the Eastern Conference semifinal series against the Heat that ended his year.

But the arrow is clearly pointing upwards for the former Kentucky star.

“Just keep improving. Keep doing the things you’re doing,” coach Tom Thibodeau said. “I love Quick. I love who he is. He can play the point. He can play off the ball. He’s good in pick-and-rolls. Very good defensively. Rebounds the ball well for his size. And he can play a lot of different roles for your team, but his hunger to improve is what makes him who he is.”