Creating PDF/A from a scanned document
You may be able to use the scanner’s software to create a PDF/A document directly -check the vendor’s documentation. If not, use one of the methods below.

If the scanner is connected directly to your computer

If you are using Adobe Acrobat, from the File menu select Create PDF, From Scanner, Configure Presets:

Select the correct device, click the checkbox for Make PDF/A compliant, and click OK:

To produce the PDF/A document, select Create PDF, From scanner again, and select the type of document. then select the OK button.