Brother MFC-T4500DW Online User's Manual page 31

Make sure the paper guides touch the edges of the paper.
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8. Make sure the paper is flat in the tray and below the maximum paper mark (1).
Overfilling the paper tray may cause paper jams.
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9. Slowly push the paper tray completely into the machine.
IMPORTANT
DO NOT push the paper tray into the machine forcefully or quickly. Doing this may cause paper jams or
paper feed problems.
10. Pull out the paper support until it locks into place.
11. Change the paper size setting in the machine's menu, if needed.
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