[Help] Lost 2018 TT file...need to rebuild...

[Help] Lost 2018 TT file...need to rebuild...

Somehow the TT data file for 2018 is missing.
2017 data file is available, and I have a full PDF of theTT return for 2018. (summary through final page.)
(also no hidden backups, stored data files etc except one first version draft.)

Datafile has a lot of past years work, includes loss carry forwards, depreciation schedules etc. Need 2018 datafile to start 2019 taxes. 

Many of the fields are calculations, finding it difficult to rebuild the 2018 data file. I would not know all the questions of the 'path' for each of the elements - just what is printed by TurboTax to file. 

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What ways do you suggest as the quickest way to rebuild the data file, and where the printed results match the filed return of 2018?

Thank you for any input.