Fulham beat Swansea 2-1 last night in the FA Cup 5th round replay to set up a 6th round showdown with United at Craven Cottage on March 7, kick off 5.15pm.
United have been given approximately 3,800 tickets costing £30 for adults, £20 for over 65s and £10 for under 16s.
Box holders, executive members and season ticket holders can apply now until 8am on Friday.
Applicants can find out if they have got tickets on Saturday.
There will not be a neutral section for this game, as the seats usually given to that section will go to United.