If your computer crashed, the return is likely a goner. It was only stored on your hard drive; it is not stored anywhere online. When you sort out either fixing or replacing your computer you can download your software again the same way you downloaded it the first time, and start over on the return. Meanwhile---do you need an extension?
EXTENSION
https://turbotax.intuit.com/irs-tax-extensions/
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-extension/need-file-extension-person...
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