So long story short I am trying to make an LED Cube 3x3x3 on my Arduino Uno right now and one of the pin unfortunately have something stuck inside it. So I was just thinking if I use TX/RX pins as replacement, will it work like normal or is there any code that I should include?
Try to get a thin flat screw driver or a small pocket knife blade under the plastic header. Gently pry it at different points. You should be able to pull this piece off and replace it after clearing the broken pin.