Is there a way to see my dead father's tax returns?

You are only entitled to see his tax returns if you have them in your possession. If your father's wife is still alive, she will most likely have all that.  Otherwise, there's no way you can "request" them from the IRS.  If his estate is being probated or handled by someone else, you'll have to ask them for permission to see any papers of his.  If you're just curious, don't be surprised if they say no.

 Your father may have taken the tuition tax credit, but he didn't report anything about your loans on the tax form. Student loans are not a part of filing your taxes. If he paid your tuition, he was entitled to take the tax credit. But that isn't a part of any loan. It's just money off the amount of tax you owe. 

First, college loans are NOT put on a tax return.

The interest might be, when paid.

The tuition it paid for might be.

As others have stated, only an executor can order copies (up to 7 years).  But this must be in writing and the reason must be tax related.  Your curiosity wouldn't be enough of a reason.

You would have to speak with the executor of the estate.

Whoever is the administrator of his estate can order copies.

The IRS is not going to send them. Move on. He's dead.

Only if they are with his personal effects at home.

The executor of the estate would have access for legitimate financial purposes, but theoretically should not be looking at them just out of curiosity.  The government is not going to show you their official copies.  You might be able to get whatever human has his personal copy to show it to you, although they probably shouldn't.

Look for the copies he kept at home. Everyone is supposed to keep copies in case the IRS questions the information on the return.