any2anexoj

This tool converts the statements from known brokers and exchanges into a format compatible with section 9 from the Portuguese IRS form: Mod_3_anexo_j

Warning

Although I made significant efforts to ensure the correctness of the calculations you should verify any outputs produced by this tool on your own or with a certified accountant.

Install

go install github.com/nmoniz/any2anexoj/cmd/any2anexoj-cli@latest

Usage

cat statement.csv | any2anexoj-cli --platform=tranding212

Incremental Reports

For year over year reporting, pass --state-file <path> to keep the FIFO buy-queue between runs. The typical workflow is:

1. Generate the first year Anexo J report from the first year broker statement and keep the state file.
2. Next year, generate the next report from the second year broker statement only, using the same state file.

# first year
cat 2024-statement.csv | any2anexoj-cli --platform=trading212 --state-file=trading212-state.json

# following year
cat 2025-statement.csv | any2anexoj-cli --platform=trading212 --state-file=trading212-state.json

The first run behaves like a normal run and creates the state file. On later runs the tool loads the previously saved buy queues per symbol (including partially filled lots), processes only the new transactions from the input, and writes the updated state. The state file is a JSON document.

Important

Each new input must contain only the new transactions, not the previous ones. The state file already holds the unmatched buy lots from earlier runs, so including previous trades again will cause them to be processed twice and may fail with insufficient bought volume.

State is only persisted once the input reaches EOF, so a crash or Ctrl-C before the end of input will discard progress from that run.

Rounding

All Euro values are rounded to cents (2 decimal places) but internal calculations use the statement values with full precision. There are no explicit rules or details about how to round Euro values in Anexo J. This application rounds according to Portaria n.º 1180/2001, art. 2.º, alínea c) e d) (Ministerial Order / Government Order) examples, which imply we should round to the 2nd decimal place by rounding up (ceiling) or down (floor) depending on whether the third decimal place is ≥ 5 or < 5, respectively.