turn in

verb

To submit something; to give.
“He turned in his paperwork to the main office.”
“The actors turned in a formulaic performance.”
To relinquish; give up; to tell on someone to the authorities (especially to turn someone in).
“The thief finally turned himself in at the police station.”
“My nosy next-door neighbor turned me in for building my garage without a permit.”
To go to bed; to retire to bed.
“I'm tired, so I think I'll turn in early tonight.”
“"Landlord," said I, "tell him to stash his tomahawk there, or pipe, or whatever you call it; tell him to stop smoking, in short, and I will turn in with him. But I don't fancy having a man smoking in bed with me. It's dangerous. Besides, I aint insured." This being told to Queequeg, he at once complied, and again politely motioned me to get into bed—rolling over to one side as much as to say—I wont touch a leg of ye. "Good night, landlord," said I, "you may go." I turned in, and never slept better in my life.”
To convert a goal using a turning motion of the body.
“At that point Leicester were playing with drive and ambition but they were undone by two goals in three minutes. First, Vieira turned in a rebound after the defender Souleymane Bamba had blocked David Silva's shot on the line.”
To reverse the ends of threads and insert them back into the piece being woven so they do not protrude and eventually unravel.