No, you would not be able to split the payments. If you’ve already filed your federal taxes with TurboTax you would have to cancel your payment and make other payment arrangements with the IRS.
Federal tax direct debit payments can be canceled up to two business days prior to the debit date. To cancel, call the U.S. Treasury Financial Agent at 888-353-4537. Then, to schedule a new payment, go to the IRS Direct Pay site.
Please click How do I change my IRS payment date? to learn more.
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