If you sell your shares FOR THE SPECIFIC REASON YOU WANTED A TAX LOSS, your claim may (will, if checked)be disallowed.
In other words, if you tell the taxman that the reason for your selling was a tax loss, it's no good.
If, however, you sell because you think the share may go down further, and then you buy back because circumstances point upwards, IYO, it should be allowed, subject to all the usual conditions.
