Estimated payment paid on 12/31 should be allocated to current year deduction automatically

"no other choice"

Really?  The default is 1.15.xx of following year (at least in Lacerte..). One has to manually force 12.31.xx (current year). It can be done globally, or on each return.

PTO might be different... but I'd be very surprised to find that PTO forces 12.31 with "no other choice"

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Let me elaborate what I meant.

On ProConnect, you can set up estimated payments for state. The estimated payments can be mailed using the vouchers or can be made electronically. 

When making these payments, taxpayers are given the option to submit the final quarter's payment on December 31, rather than waiting until January 15 of the following year (see image below).



The purpose of this option is clear: to allow inclusion of the payment as a deduction in the current tax year. Accordingly, when I treat all "Voucher amount (memo)" entries as "Amount paid" entries, I also expect the date paid will be default to the scheduled date rather than the due date.

In the case of electronic payments, the dates are fixed, unless if you call the IRS to re-schedule it. Rather than I remember the date which I scheduled a year ago, the software should remember it. The software should have the payment dates populated as scheduled instead of me manually putting the date, and I only need to certified all the payments happened on the scheduled dates.



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