How can I cancel my e-file order that has been already accepted I did my taxes wrong I’m under age

You mean you e-filed and the return was accepted?   You cannot cancel that.   You just have to wait now for the IRS to process your return.   If you made mistakes you will be able to amend after it has been processed.

I did do a mistake my e-file has been accepted I did my taxes wrong I don’t want it to mess up my credit score so how can I fix it and delete my whole file and return what they gave me

@d01f30dcd196 AGAIN----once you e-file a tax return, you cannot get it back or cancel it.  The IRS has your tax return now and they are not going to give it back to you.   If you made mistakes you can correct them later by amending.   But do not try to amend until the IRS finishes processing your return.   The IRS finds and corrects some mistakes for you.   Wait to see what they do, and then make the necessary corrections if you still need to