Here is a quick guide on how to submit completed work for Gradescope.
Note: Make sure you are familiar on how to upload different types of files, see What are the different types of submissions in Gradescope?
When you submit any type of assignment, you will receive an automated email from Gradescope that includes the date and time you turned in your work, the assignment Due Date, the Late Due Date (if your instructor set one), and a link to your submission. The email also reminds you that you can resubmit work as many times as you need to until the Due Date.