Retirement tax questions

Thank you! So basically I'm choosing to enter the information manually now OR wait til I get the official 1099-R, but I would not do both?

Is there any benefit/disadvantage to waiting to get my real 1099-R? Specifically..

(1) Since this is correcting for an excess roth IRA contribution, would there be any additional fees for not reporting this now vs. next year?

(2)Would state-submission still be by mail if I wait until next year?