I just filed my taxes and reading through the paper copy I found a mistake I made. What do I do to correct?

[IreneS]

Nothing just yet.  If you have already filed your return, you have to wait until the IRS either rejects or accepts your return.  If your return is rejected, you will be able to go into your return, change your income, and re-submit your return. 

If your return is accepted, wait until your have received your refund (or your payment has been processed).  THEN you can prepare an amended tax return and mail it in.  You cannot e-file an amended return.

DO NOT go in and start changing anything on your return now, or you will make a mess for yourself.  Sit tight and wait until you see what the IRS does with the return you just e-filed

Please see this FAQ for instructions on amending a return:  How to amend (change or correct) a return you already filed