Individual return? Screen 7.1. 2nd item is Estimate Options > State Column > Select one of the options.

In the next section you can input a fixed amount for 2021 estimated tax  [O] to make an override.

There are more sections below for Federal and Maryland Adjustment to add or subtract to the 2020 income to do the estimates.

There is a search that might find things for you. Select Lacerte as product first, then use just a few words.

https://proconnect.intuit.com/community/forums/searchpage/tab/message?advanced=false&allow_punctuati...

Then click Articles.

As it turns out, I am an idiot.  I was causing it not to calculate an state estimate by placing "7" on the "Apply overpayment ...." line.