Merging queries in Power BI and adding a data source

Hello, I am in the process of merging three or four columns from one table to another. We have a main data source we get invoices from and then an Excel workbook we add the invoices that we have processed. I was hoping to merge the the columns by invoice number.

A couple of issues though, the invoice numbers aren't exactly identical so I try to fuzzy match which gets me all the results I need but I'll usually end up with a load of duplicate results.

Our data source for our invoices (not the workbook) needs to be replaced daily. Is it still feasible to replace this source and still maintain the merged queries?

Thank you