I wrote my address wrong on my return, so I never received it. Do I need to file an amended form with the correct address, or do I handle this another way?
You won't need to amend the return. Amends are for changing filing status, income, deductions, or credits. The address on your return is where the IRS (and state) would send you notices, or if you chose to receive your refund by check, the address the check would be mailed. If you chose direct deposit, the wrong address should not affect your refund.
The IRS page offers several options for changing your address: