I know that depending on the specific SAT, college board grades the test differently. But in general about how many points will you drop for a perfect score if you miss one problem?
In general, 20 points. Sometimes missing one is still a perfect score, but the average is around 20 points.
The curve varies from test to test. Generally, it’s a bit more lenient than the old SAT, so you can expect to drop around 10 points per problem I believe. I could be wrong though.
10
This is what I noticed about the official practice tests:
PT1/2/3/6: 1 incorrect answer means 790, and 2 incorrect answers mean 780
PT5/7: 1 incorrect answer means 790, and 2 incorrect answers mean 770
PT4: 1 incorrect answer still means 800, and 2 or 3 incorrect answers mean 790
Generally, you would drop 10 points if you got a raw score of 57/58.
I am unsure whether I am allowed to discuss my score and number of incorrect answers, though.