How do I get last years taxes if the guy who did mine died?

You should have received a copy of your last year's tax return when it was prepared from him.

You might contact his previous contact information or go to his prior year physical office location to see if someone else has taken over his business and has the prior year files kept by the deceased tax preparer and can assist you.

The Get Transcript Service is for individual taxpayers to retrieve their own transcripts for their own purposes. 

You can get various Form 1040-series transcript types online or by mail. If you need your prior year Adjusted Gross Income (AGI) to e-file, choose the tax return transcript type when making your request. To find out how much you owe or to verify your payment history, you can view your tax account.

The method you used to file your tax return, e-file or paper, and whether you had a balance due, affects your current year transcript availability. Note: If you need a photocopy of your return, you must use Form 4506.

You can apply to IRS for a "transcript" of your prior year return by referring to the following link:

IRS Get Transcript