It is quite easy to write out the tab numbers by hand on the music sheet.
Look at some other songs in the same key that is already TABed out and note the number for the fingers for the notes and for what string.
Since there are no TAB lines one have to write out the string name with a letter before the number for the fingering. Also to avoid it getting messy only write out the letter for the string when there is a change in string.
For the high and low fingering one can use +/-.
Only write out the number once for ”tied notes” (eg the 10th note in the notation ie A1).
As an example for the first row i.e. the first 9 bars of the music for Lake Dore Waltz above, the tab notation could be: