What PHP file do I need to edit my theme to make postings centered?

There could be many pages/things in the CSS. Where do you want the posts to be centered? And by centered do you mean just the text, or the entire post itself?

A link to the site would be much more helpful.

https://i47.tinypic.com/ayx3fc.jpg
https://i48.tinypic.com/2z6771w.jpg

The second picture is the correct way i have my text, the first one is what i’d like to be in the center see before I wasn’t having problems with adding a new category but not untill a few weeks ago or so I couldn’t add one I mean I could click on add cat and enter a name in there click add and nothing but once I published my post I’d use CTRL + F and find the name i entered and it was in there. so there was something messed up so I decided to download the theme that I was using and overwrite everything now the cat’s work now! and im just trying to put it back to where i had it before this whole shit storm happend.

There likely won’t be anything that is align:left because that is how text is aligned by default. You want to look in the HTML and find the div that wraps the post. Then find that in the CSS, and add text-align:center;

can I just zip up my theme and send it to you so you can do it sir? i’m wicked lost ;-(