IF({Address 1}, {Address 1})&
IF({Address 2}, “\n”&{Address 2})&
IF({Address 3}, “\n”&{Address 3})&
IF({State / County}, “, "&{State / County})&
IF({Zip / Postal Code}, “ “&{Zip / Postal Code})

Thank you; however, it's still giving me an error:

I'm just trying to get rid of those pesky commas in the address complete box if those other boxes are empty.

Place your cursor before the ampersand in front of State / County, delete the “, “ and retype them in. 

That worked for getting it to turn blue again, but still gave me an error. Thank you so much for being willing to help. I'm just awful at this. I still need the complete address to show up if there is an address entered. I just need the cell to be blank if there are no addresses's present. That specific cell is referenced in a mapping software that is integrated.

You're not terrible at this - you’re learning.

Try finding the troublesome part of the formula by copying the whole thing and then pasting it in one IF at a time. First you paste in 

IF({Address 1}, {Address 1})

then, if that works, add the second one like this

IF({Address 1}, {Address 1})&
IF({Address 2}, “\n”&{Address 2})

and so on until you get the error message.