apple says i authorized 5 computers - i only have 2 authorized and want to add one more

Each Apple ID can support authorization for five devices. Once you reach that limit you must de-authorize devices in order to add a new one. Or you will need another Apple ID. Devices authorized on the second Apple ID are not authorized on the first one.

There is a limit of three Apple IDs. After that, you must pay for additional ones.

Deauthorize them all, then reauthorize the ones you want.

Log into the account on a computer's iTunes : Deauthorize your computer using iTunes - Apple Support

I've done this, but still won't allow we authorize

okay so how to I do this since 2 computers no longer even work