"semi-automated transactions" - adding postings with hledger-rewrite (https://github.com/simonmichael/hledger/blob/master/extra/hledger-rewrite.hs)

"semi-automated transactions" - adding postings with hledger-rewrite

$ git clone http://code.hledger.org hledger
$ cd hledger
$ stack build hledger
$ stack ghc extra/hledger-rewrite.hs
$ mv extra/hledger-rewrite ~/.local/bin
$ cd ..
$ hledger-rewrite --help
hledger-rewrite [OPTIONS] [PATTERNS] --add-posting "ACCT  AMTEXPR" ...
  print all journal entries, with custom postings added to the matched ones

Flags:
     --add-posting='ACCT  AMTEXPR'  add a posting to ACCT, which may be
                                    parenthesised. AMTEXPR is either a literal
                                    amount, or *N which means the transaction's
                                    first matched amount multiplied by N (a
                                    decimal number). Two spaces separate ACCT
                                    and AMTEXPR.
...

1. enter a basic revenue transaction

2016/3/2 payment received
    revenues:business                              $-1000
    assets:business:bank:wf:bchecking:available

2. use hledger-rewrite to add some postings

$ hledger-rewrite -f t.j revenues \
    --add-posting '(assets:business:accounts receivable:client1)      *-1' \  ; a. decrease receivable by revenues amount
    --add-posting '(liabilities:personal:tax:federal:2016)           *.25' \  ; b. increase taxes owed, by 25%
    --add-posting '(liabilities:personal:tax:state:2016)             *.02' \  ;    and 2% of revenues amount
    --add-posting 'assets:business:bank:wf:bchecking:year:tax:2016  *-.27' \  ; c. save that amount to the 
    --add-posting 'assets:business:bank:wf:bchecking:available       *.27'    ;    tax envelope

3. output

2016/03/02 payment received
    revenues:business                                      $-1000
    assets:business:bank:wf:bchecking:available             $1000
    (assets:business:accounts receivable:clearview)         $1000
    (liabilities:personal:tax:federal:2016)                 $-250
    (liabilities:personal:tax:state:2016)                    $-20
    assets:business:bank:wf:bchecking:year:tax:2016          $270
    assets:business:bank:wf:bchecking:available             $-270

4. or rewrite current entry in Emacs... etc.

select transaction(s), C-u M-S-| hledger-rewrite -f- ...