Joint estimate box inside Screen 6 2020 Estimated Tax Payments

[missygrushkin]

Could someone explain to me what the box in Screen 6 2020 Estimated Tax Payments called Joint estimates is for?  You then enter former spouse SSN & Explanation.

[PhoebeRoberts]

You're filing MFS or single or HoH and need to claim your share of estimates made when you and your (ex-)spouse thought you were going to be MFJ. Because otherwise the IRS will give all the ES credit to the person whose name appears first on the ES voucher.

[missygrushkin]

Ok so it's not a way that we could use to flag to the IRS that on a joint return the tax payments were made under the spouse's SSN to avoid a notice or call when the account truly is paid in full.