I have installed some drywall on a door frame that sits adjacent to an existing wall. It ended up with the new wall not properly aligned with the existing wall as seen in attached pictures. Any ideas on how I can address the same. My intention is to create a seamless finish with the existing wall / new drywall Thoughts / ideas appreciated.
It's going to be very difficult to get a good finish using drywall compound slathered on thickly.
I recommend that you remove the drywall you installed and re-frame or shim the doorframe out so that once you place the drywall it will be right in line with the existing drywall.
That should leave you with just a seam to be taped and make finishing it much simpler.