In using TurboTax, I normally tell the program to calculate (but do not print) my estimated tax payment quarterly values. That allows me to see what it thinks my payments should be. In the IRS payments system, future payments are scheduled individually by you, not any kind of "auto debit" scheme. For example Apr, Jun, Sep, Jan (or any other specific dates and amounts) are scheduled by you. Enjoy it . . . I've used it for three years . . . It's super convenient.
