# Transaction modifier adding (unbalanced) tax postings.
# print. Auto-generated postings are inserted below the matched one.
<
= ^income
  (liabilities:tax)  *.33  ; income tax

2016/1/1 paycheck
    income:remuneration     $-100
    income:donations         $-15
    assets:bank

2016/1/1 withdraw
    assets:cash             $20
    assets:bank

$ hledger print -f- --auto
2016/01/01 paycheck
    income:remuneration           $-100
    (liabilities:tax)              $-33    ; income tax
    income:donations               $-15
    (liabilities:tax)               $-5    ; income tax
    assets:bank

2016/01/01 withdraw
    assets:cash             $20
    assets:bank

>=

# register
$ hledger register -f- --auto
2016/01/01 paycheck             income:remuneration          $-100         $-100
                                (liabilities:tax)             $-33         $-133
                                income:donations              $-15         $-148
                                (liabilities:tax)              $-5         $-153
                                assets:bank                   $115          $-38
2016/01/01 withdraw             assets:cash                    $20          $-18
                                assets:bank                   $-20          $-38
>=

# balance
$ hledger balance -f- --auto
                $115  assets
                 $95    bank
                 $20    cash
               $-115  income
                $-15    donations
               $-100    remuneration
                $-38  liabilities:tax
--------------------
                $-38
>=

# Balance assertions see the generated postings.
<
= trigger
  (target)   10

2018/1/1
  (trigger)   1
  (target)    1    = 11  ; this assertion would not fail, auto posting will be taken into account

$ hledger register -f- --auto
2018/01/01                      (trigger)                        1             1
                                (target)                        10            11
                                (target)                         1            12
>=

# Transaction modifier adding (balanced virtual) budget envelope postings.
<
= ^expenses:groceries
    [budget:groceries]                           *-1
    [assets:bank:checking]                        *1

2018/10/7 * MARKET
    expenses:groceries:food
    assets:bank:checking                         $-20

$ hledger print -f- --auto
2018/10/07 * MARKET
    expenses:groceries:food
    [budget:groceries]                 $-20
    [assets:bank:checking]              $20
    assets:bank:checking               $-20

>=