Can you file I-140 and I-485 together?

Yes, this is known as concurrent filing. If you have filed an I-140 petition, you are eligible to file I-485 (adjustment of status) application. You can do so by submitting the Receipt Notice of the pending I-140 with the I-485 application.

Additionally, applications for Employment Authorization (EAD) and Advance Parole may be filed with the I-485 application. Family members (spouse, children) can also file I-485 at this time.

now a concurrently filed I-140 and I-485 petition will be adjudicated simultaneously. However, if your I-140 is denied, I-485 will also be rejected.