I keep posting threads / replies and realising there are typos in there, but I see no way to edit them?
Is this possible?
The option to edit your own post is only available after you've achieved a certain rank. For example, your current rank is "New Here". By posting and interacting in this community, you will move up the ranks and have this option available to you. If at this time you need to make an addition to a post, you can reply below it and add the information you missed. If you added private information or similar and would like to remove that from your post, please use the Report button and an admin will do so for you.
Hope this helps!