Go to tax tools, go to the print center, print out your return and mail it in. Can't guarantee that your return will be accepted and a refund will be processed. If you send it in with the numbers showing the 2018 distribution spread out over the three years or send it in with the draft form, it likely has a high probability of getting flagged and the refund not getting processed.
If it was me and I really needed the refund, I'd go back through TurboTax's prompts and answer no to the disaster distribution prompt and e-file that way. Then go back when the form is available and submit an amended return.
