Code the sale as US (or whatever the resident state is) instead of 'CA'. 

There's a box at the top (right side) to source the entire screen to the appropriate state (or US if your client is in a non-tax state) or you can do it entry/line by line using the the drop down box by the sale price & cost.

If you speak 'batch' entry (Ctrl W) you can change the assignment to the correct state there; that's much quicker if there are multiple entries.