Not though Turbo Tax.  

If you want to file for free you can fill out the forms by hand. Here are some basic forms…..

Here is the IRS 2019 Form 1040
https://www.irs.gov/pub/irs-pdf/f1040.pdf

or if you want bigger type use 1040SR for Seniors,
https://www.irs.gov/pub/irs-pdf/f1040s.pdf

And 2019 Instructions https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
2019 Tax and EIC Tables https://www.irs.gov/pub/irs-pdf/i1040tt.pdf

Sch 1 : https://www.irs.gov/pub/irs-pdf/f1040s1.pdf
Sch 2 : https://www.irs.gov/pub/irs-pdf/f1040s2.pdf
Sch 3 : https://www.irs.gov/pub/irs-pdf/f1040s3.pdf

You missed the deadline for filing for free using TurboTax.  When the online software re-opens in early December it will be for 2020 returns only-- no other year.  Use the paper forms if your grandson has a simple return--and going forward -- be more aware of the deadlines.