Most filters are keyed to fit, which means you have to rotate it 90 degrees (counter-clockwise) to unlock the tabs and release it. If it is a frigidaire rectangular filter in the ceiling of the fridge, it may be frozen in place, so warm it with a hair dryer and GENTLY remove it.
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Most filters are keyed to fit, which means you have to rotate it 90 degrees (counter-clockwise) to unlock the tabs and release it. If it is a frigidaire rectangular filter in the ceiling of the fridge, it may be frozen in place, so warm it with a hair dryer and GENTLY remove it.