Simple tool to manage taxes that a freelance teacher has to pay in Spain. An example of how to use this tool is here.
As this is tool that only works for taxes in Spain, the information is written in Spanish. However, please, feel free to add issues or ask questions in English. In case you are adding a question, tag it with the label "question".
Usually I work on this tool during taxes declaration periods, that is on January, March, June, September. So, most of modification of tool are done in these periods.
Read this is in Spanish.