A 2019 Form 1041 for a trust can be filed for a tax year beginning and ending in 2020 if the trust has a tax year of less than 12 months that begins and ends in 2020 and the 2020 Form 1041 is not available by the time the trust is required to file its tax return.
See https://www.irs.gov/instructions/i1041#idm140366338175360
Frankly, you are probably better off waiting until the 2020 forms (and program) are available since any tax reporting statements will most likely not be issued until early next year and you will have to print and manually modify certain forms in the 2019 version of TurboTax Business.