On sch 5 line 66, my 2017 ovrpmt and my 2018 est pmt are being combined. are these being processed properly timeline wise?

[AnthonyC · Accepted solution]

Yes, they are combined for total purposes but are applied on a different timeline - see an excerpt from IRS "Any overpayment from your 2017 return applied to your 2018 estimated tax payments. Generally, treat the payment as made on April 17, 2018"