You are NOT forced to file a 2019 tax return with TurboTax, you can file the 2019 tax return with anyone that you choose. 

The Stimulus Registration is ONLY if you do NOT have to file a 2019 tax return and you are NOT required to file a tax return and you do NOT receive Social Security benefits, then use this TurboTax website to register for the stimulus - https://turbotax.intuit.com/stimulus-check/

How long will it take for the IRS to approve stimulus registration? It's been sent, accepted but now wondering when it will get approved.