You can begin by signing into your TurboTax Online account using the same UserID/Password that was used to file last year's tax return. Once you have signed in you will have the option to import your prior year information or proceed without importing. You can then begin working on your tax return.
https://ttlc.intuit.com/replies/3300238
In addition, many
of the forms and schedules in your tax return have not been finalized. You can
click on Review on the left side of the
screen and this will show a list of forms that are not yet available, along
with the availability date.
Here is an FAQ link of the IRS Forms Availability Table:
https://ttlc.intuit.com/questions/1908854-forms-availability-table-for-turbotax-federal-products-exc...
Here is an FAQ link of the State Forms Availability Table:
https://ttlc.intuit.com/questions/1908857-forms-availability-table-for-turbotax-state-except-business
If you have any questions, please reply below.