Yes, if you have already filed your tax return you can sign back into your online account and access a copy of your tax return.
The bank routing and account numbers can be found on your 1040 form on the following lines below, depending on the form you used. If you see XXXXXXXX then that means you will receive a paper check.
1040 line 20
Sign back into your account and on the Home Page click "Tax returns and documents"
