This method of using Google Forms with Google Sheets was ostensibly designed to gather and analyze survey data, but with a few tweaks it works just as well to record your financial transactions ...

You can use Google Forms to create online surveys, quizzes, and feedback pages. Here’s how.

Google Forms is a free online software for Google account users in the Workspace suite that lets you create surveys, questionnaires, and quizzes.

Learn how to create a fillable form in Google Docs. You can insert checkbox, signature box, etc. in Google Docs using this guide.