Hi @Carr2012 ,
Linking Form sections and Excel tables
Are these sections 'conditionally displayed' to the user? For example, let's assume that your company provides 4 different types of services (A, B, C and D) and the user, in one of the first Form questions, needs to check the services that they intend to contract. If the services B and C were checked, the Form will redirect them to fill the respect sections only, skipping the sections "A" and "B".
If this is the case, you can use the 'Condition' action, one per each section, to identify which tables must be populated. Instead of insert all of section questions in your 'Condition' statement, you can include only one question and test if it is empty. If it is not empty, the user necessarily entered in that Form section, so the respective table must be populated.
Creating an Excel file copy from a template
This task will be easier than populate the tables 🙂
First, add a 'Get File content' action (from either SharePoint or OneDrive connector, depending on where your template is stored) and search for your Excel template in 'File Identifier' input:

Then insert a 'Create file' action (from either SharePoint or OneDrive connector, depending on where your want to save it) and specify the folder where you want to save it. In file name, make sure to include the file extension (.xlsx, for example). A good practice is also to include a unique name for the file; in the example below, I'm including user name, extracted from the Form submission. In 'File Content' input, insert the 'File content' dynamic content from 'Get file content' action.

Let me know if it works from your end or if you have any additional questions!