When can I load 2018 return to Turbotax in anticipation of filing 2019 returns?

TurboTax 2019 tax software does not come available until the end of the year.  Usually, the download software is available sometime in November & the Online version sometime in December.  No exact dates have been given yet.

also be aware that at one time TT posted that the 2019 desktop software will only work on Windows PC's with an operating system of 8 or higher.  online will still work with win 7.