# Smart Aggregation
## Guide to set Smart Aggregation
### Step 1: Go to settings and select Smart Aggregation under local settings
### Step 2: Set Smart Aggregation source
Click on Edit and for a field to be auto-populated choose from the options available from the dropdown
### Step 3: Once you have made the desired changes click on Save Changes
(Please Note: The updated Smart Aggregation settings in step 2 will only apply to invoices which are ingesting in Capture after the new settings were saved.)
### Step 4: Start ingesting invoices in Capture and wait for digitisation to complete
### Step 5: Click on View for an invoice that you want to review and go to Extraction issues
### Step 6: Review the fields that have been extracted
### Please note:
1\) If the field has been successfully populated then you will see a green icon with the source name
2\) If the field has not been successfully populated then you will see a red icon with the source name
3\) In case of where GSTR 2A and EWB have nor been fetched for a document you will see a loading sign
4\) Smart aggregation for a field will not happen in case if it was manually edited and saved by you in the invoice review screen before the auto-population could happen using GSTR 2A, EWB and Field data
5\) Derived field option in case of Buyer/Vendor state code and name will allow you to auto-populate the respective fields using the first 2 digits of OCR extracted buyer and supplier GSTIN
