Welcome to the Community space, jeeper. I can share various ways to make an estimate signature.
As of now, adding a signature to an estimate is unavailable. As a workaround, look for a third-party app by going to the apps.intuit.website or navigating the Apps menu in your QuickBooks account. I'll show you how:
Go to the Apps menu on the left pane.
Select the Find Apps tab, then type a keyword in the search bar like E-signature.
Click the magnifying glass and then choose the app that suits your needs.
I was able to use the get signature button on the mobile app but can't find that signature afterwards. Where does that signature actually go? Was hoping it would input itself into the estimate for printing.