To upload documents from Digilocker while applying for a passport, you must first have a Digilocker account. If you don't have an account yet, create a new account on Digilocker. After creating the account, upload all your documents, such as Aadhaar, Driving License, Voter ID Card and others to Digilocker. Once uploaded, you can easily upload these documents to your passport application through your digilocker account.