I am looking to amend my 2021 California return for the same reason. I didn't include medical expenses for federal return as it was under the 7.5% AGI limit, but that was due to a larger HSA distribution. When I add that distribution back in for California it amends my CA return with a positive amount.
I too don't see any change to the value on Line 1, in fact the math doesn't work, but the amount on line 4 looks correct, so there appears to be an error in this case in Turbotax as it fills that portion of the form, but the outcome is correct.
Since I am doing an amended form, I guess I will do it by hand to get it to look correct and then mail it in.
