After you file

Do you know when i can do the amendment on turbo tax? One place it said 2/5 another said 2/12. I know after i do it i need to print out and mail it in that i can not efile it. Do you know if the second refund can be direct deposit or will it be a paper check? I added the w2 to turbo tax after i filed and it basically doubled my refund. Should i go in amd take it out for now until i can amend it?