Answer
If you start off with a form like below you have several options to straighten up the margins:.
You can you alt drag the form, change to white and if needed bring some elements to the front/back.
Or you can add a stroke to the bottom shape. In the ‘stroke panel’ select “more options” in the top right and then choose “align stroke to outside”
Or click bottom element and select “Object / Path / Offset Path” and colour the new form white.
Clean up
Once you have on of those forms you probably want to clean it up, so you have no white in the logo and a nice transparent background. Either manually using the form as guide
Or with the Pathfinder; selecting elements to cut and clicking divide. This splits up overlapping elements allowing you to delete the not needed parts.
Attribution
Source : Link , Question Author : localhost , Answer Author : Julian Steinmann