ITO is an archaic name (like my handle) for ProConnect Tax, which Intuit still appends with Online sometimes (hence, PTO).

If you have a 2019 file from Lacerte, you can use the data conversion tool to proforma the 2020 return in PTO.  You can refer these articles for how the data conversion process works:

https://proconnect.intuit.com/community/convert-data-files/help/proconnect-tax-online-conversion-inf...

https://proconnect.intuit.com/tax-online/data-conversion/