Software to edit scanned doc!

Is there any way to edit the scanned document to correct some spelling or word etc? Scanned Doc is now in jpeg format

The software suite of your own printer may or may not have a feature known as Optical Character Recognition (OCR) At best, in my limited experience, OCR is imperfect and tedious.

I dont have scanner actually, docs are actually scanned in any other city by any shopkeeper so it is difficult to find OCR software for that printer. Is there any way to do that reliably?

To use Optical Scan Recognition, you would need to actually have a Scanner to freshly scan the paper copy of the document. That's because it is during the scanning process that the OCR function makes its "best guess" as to what the type font characters actually represent. If you are attempting to clean-up documents for your own use and distribution to others, you may be best advised to obtain the original document in .doc file extension so that you can use your Word or other document handling software to edit. It is "possible" to use an image viewer such as infranview or print shop to overlay a mis-spelled word by using the "insert text" function. The icon for that function is usually a large capital letter A. Using an image viewer/editor becomes more of an "artistic challenge" than a simple editing task, since you will have to experiment with font size and placement of the substituting text. It might also be possible for you to use a PDF Editor if you have one. And if you can save the image into PDF format.

I just wanted to add that even the most inexpensive scanners have ocr and If it is inferior you still can edit your work in Word.