Does anyone know when Form 4684 or just Forms in general get updated by? I can't file my taxes yet due to the form being old and nobody knows when it updates.

Per updates, it is not available until 2/12/20. 

See update, click here Form 4684

The forms are available if you are going to download from the IRS to complete it on your own.  However, e-filing is different.  Once the form is finalized by the IRS, it has to be coded into the special language the software uses and has to be thoroughly tested for calculations and e-filing acceptability.  IRS then has to approve it for e-file.  It always takes a little longer for a form to become available for e-file in a software program.  I hope this helps you understand the situation. 

As of today the form is available.