If you need some corrections to be made and they are not new instructions, you can ask for a free revision. Free revision time depends on the order length. For short papers – e.g., less than 20 pages in length - it is 48 hours after deadline expiration and 30 days for orders that are more than 20 pages in length. Still, if you want to make some new changes in the paper, you will have to pay compensation for additional work.