2004 Nissan Altima

My mom chewd me out because there is a long bubble in her back window panel and the corner in the top right is peeling off she thinks I did it how much will it cost to fix and how long will it take
also is there anything we can do at home to fix it with out messing it up more?
July 3, 2013.

You can try using a soapy water solution and spray it where the tint is lifting. Using a credit card or =, try to smooth the film back into place.