Can I file a 1040 form if I have a 1099r

I am sorry for your loss.

Yes you can and must file a 1040 if you meet the filing requirements. https://www.irs.gov/newsroom/who-needs-to-file-a-tax-return

Turbotax will walk you through it and tell you if you don't need to file or it doesn't matter. Some 1099-r are not taxable or are partially taxable (e.g. from Roth IRAs). TT will figure that out when you tell it about the distribution codes (or it will automatically know that if you import the form).

Everyone prepares an individual income tax return using Form 1040.  Or if you are 65 or older it will print on 1040SR, which is identical except it has bigger print.

A 1040 is the tax return form you prepare here to send to the IRS.   If you start entering data in this software you are preparing a Form 1040.   Please look at it so you will know what you are sending to the IRS:

PREVIEW 1040

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/preview-turbotax-online-return-filing/L77WCkvnu_US_en_US?uid=m681fkhr

To enter your retirement income, Go to  Federal> Wages and Income>Retirement Plans and Social Security>IRA  401 k) Pension Plan Withdrawals to enter your 1099R.