If you've already filed and your return has been
accepted or mailed, it's too late to change your bank account information for
direct deposit but since the info you provided is for a closed or
invalid account, your bank
will return the refund to the IRS and the IRS will mail a refund check
to the address provided in the return. Paper checks generally take anywhere from 4 to 6 weeks to arrive once sent out by the IRS.