Refund Applied to Estimated Taxes Not Updating Vouchers

[TERA1]

I see this problem asked a few times but no solutions for me. I want to apply a refund to my estimated taxes. I enter the refund on the 1040/1040SR Wks and that updates my 1040 (as an aside why does one have to enter this manually, it should have to option to just apply refund). But this does not affect the Estimated Tax vouchers nor does it carry over to the Est Tax Options where there is a line for Last year's overpayment you apply to this year (which can't be entered manually). I know there is a solution as I ran into this problem before but it escapes me what it is.

Thanks for any help.