In order to submit documents to the EDGAR system, a company first needs to register with SEC (by sending in a Form ID), then they are encouraged to send their business documents in as soon as they can. The SEC has a 5.30pm deadline so documents can be sent up to 3pm the same day and will still usually meet the deadline. How quickly the document is processed depends on its complexity although an EDGAR operator can generally process around 20 pages an hour.
Documents should be sent as Word files although PDFs are acceptable, but can mean that it takes longer to check the first draft. Once the SEC has received all the submissions, it will take 24-48 hours to review and process the request. You will receive an e-mail, stating whether your filing was accepted or not. Alternatively, you can find out on the EDGAR filing website.
The current fee rate (correct as of 2019) is $121.20 per $1,000,000. You can calculate the fee by multiplying the aggregate offering amount by .0001212.