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Always purchased Home & Business from Costco for prior years.
If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created. TurboTax does not store online any returns completed using the desktop editions.
See this TurboTax support FAQ for how to move tax files to another computer - https://ttlc.intuit.com/turbotax-support/en-us/help-article/data-systems/move-tax-data-file-another-computer/L5fFkMkhr_US_en_US
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