My first time building a shed by myself and it's been a lot of work, since it is on a slope. I got the piers and columns in, had it squared, and put cut plywood in the corners.

I cut all the joists, and I guess exhaustion and rushing, I didn't double check the squareness and I put all the joist hangers on and anchors from the rim joist to the 6x6 posts.. with 16d galvanized nails that are not coming out. Some how it shifted even with the corner braces. Guess plywood was a bad choice for holding square.

It was originally one inch off, but I got it down to 3/4.. knocking it with a 4lb sledge hammer..

What are my options? If I start framing how much will this effect the walls?