It's your employer or client's responsibility to give you your 1099-MISC. You'll want to reach out to them to invite you to fill out your W-9 online. It requires you to create a QuickBooks Self-Employed account.
Once they submit your 1099-MISC to the IRS, you'll get an email when it's ready for download. Sign in to QuickBooks Self-Employed to view or print your 1099-MISC.