Thank you both for your replies which confirm that my understanding was correct.
Given that, I will expand my question. I have, as I said, long term gains. But I also have long term losses and, in 2021, I expect ( let's say significant) short term gains but no short term losses. In order not to pay tax on the short term gains I would have to offset those short term gains with long term losses. However, unfortunately those long term losses would first be used to offset the long term gain. Correct?
That's not what I want.
