my father passed away. Can TurboTax help me find his past tax records without alerting IRS's attention

So sorry for your loss.  If you do not have your dad's account and user ID you will not be able to access his tax records on the site.   First----did he use online or did he use the CD/download?   if he used the CD/download the tax returns are only stored on his own hard drive.  They are not stored online.

If he used an online TT account, you have a lot of information to provide to TurboTax to gain access to his account.  Here is a copy of information provided to a user in a simiilar situation:

Filing for relative who died

Hello @, I'm sorry to hear about your loss. I understand that this may seem like a lot to get into an account but we must take all due precaution to ensure the protection, privacy, and security of customer account information. We wish to make sure that the data your sister-in-law entrusted us with is protected. 
You will first need to fill out an Email Change Request: https://ttlc.intuit.com/questions/1899319 
In addition to your own photo ID, you must include one of the following documents: 

• A copy of the Death Certificate – The name of the surviving spouse will need to be matched to a Joint E-filed Return in our system
• A court order issuing Power of Attorney for the deceased and IRS form 56. (required for non spouse)
• A court order marking them the executor of the estate and IRS form 56. (required for non spouse)

These additional documents may be included with the initial scan of the Photo ID.
You will also need to print and mail the return and include IRS Form 56. 
I hope this helps!