"or should I just wait till the end of the month to get the best tax return possible?"
Understand that many IHUBers are unemployed (another name for "trader") or retired and have little concern for tax issues. So taxation rarely comes up on these boards.
First question: What country do you pay taxes to? Second question: How does waiting a week or two change your tax situation?
In my case I ALWAYS dump my very rare losers in the final two or three months of the year. My losses are rare because I don't buy casino junk like NBG and I hold my blue chips for years.