How do I validate the test case (e.g. filled form was added correctly into the any table) in PyCharm?

I would like some advice.

Imagine that I write the test case in Python in Pycharm environment. After it I run it and all steps passed correctly.

But imagine the situation that I need to verify that I fill some form on the webpage and after it is saved I need check that the document of any data type (filled form) is added to the table in which are alrady some forms (e.g. orders).

How do this? How to verify that the form (order) is added to the table or it is not added in webpage.

Thanks a lot.

LT