Hi when I filed taxes I selected that I couldn't be claimed can I change that please my mother claims me. I am dependent upon her

You can not just change the field that says you can be claimed as a dependent. You must amend your return. Do not make any changes until you start to amend.  Here is how to amend  . And amendments must be mailed, they can not be efiled.

https://ttlc.intuit.com/questions/3061514-how-do-i-amend-a-2016-return-in-turbotax

Under your personal information, change that you can be claimed on someone else's return