You can jump around,
BUT,
after the updates are released that make the program fully functional for 2020 (say, January 21 or so), go through everything in order one time before you file. Just to be safe.
(Turbotax will accept returns for e-filing beginning January 7, but they will go into cold storage. The IRS will officially start processing e-filed returns January 27. Depending on the forms you need, certain forms and tax law changes may not be ready until February.)
