How do I add direct deposit info? Do I do it b4 I finish filing? Bc I dont see an option anywhere and im afraid to finish bc I don't want it mailed

Yes, as part of the filing process in TurboTax, you will be asked how you would like your refund.  Once you select direct deposit you will have the opportunity to enter your banking information.  

At the end of the interview, in the file tab, there are three parts. Part two that you put in direct deposit information and part three files the return.