Uploading 2021 Budget done in Google Docs to New Foundation Template

I have a 2021 Budget, including categories, accounts, etc I created in Google Docs. We are wanting to use the previous categories to allow us to start using the product again. In doing some research I see that version of Google Docs is no longer supported and that I need to transition to the new Foundation Template. I have not been able to find a clear set of help directions. Thank you very much.

For core product support, you can also search the Tiller Help Center at https://help.tillerhq.com, where we have hundreds of resources. What kind of customer support does Tiller offer? | Tiller Help Center

I’d recommend reaching out to our support team via the chat window in the lower right corner of the Console at https://my.tillerhq.com/

We can help you transition to the newer version. We’ll also take a look at your subscription and see what exactly needs to be updated.