> For the complete documentation index, see [llms.txt](https://cee-systems.gitbook.io/tcp/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cee-systems.gitbook.io/tcp/starting-with-exchange/new-calculation/untitled/modification-in-comparison-table.md).
# Modification in Comparison table
There can be a situation when taxes will be lower in the new calculation thus you may want them to be refunded. In these cases, you may need to add a new tax. Below are few examples how to modify info**r**mation in the comparison table.
**TAX Refund**
New ZO tax is lower and the difference can be refunded, therefore the relevant switch in the *Do refund* column is on. **Please note that the refunded ZO tax cannot be used to partly compensate the difference in the YQ tax which must be** **additionally paid in whole.**
**ADD a new TAX**
The tax code and the amount can be entered now. The amount must be confirmed by clicking on *Please confirm your input*.
The amount must be confirmed by clicking on *Please confirm your input*.
**Modify TAX difference**
When there is a need to collect a tax difference higher than the one calculated by the system (in this example YQ CZK 85), the original amounts are crossed out and new ADC amount is calculated (CZK 290).
**Penalty as a TAX**
Penalty collected as a DU tax is shown in the Comparison table under taxes as well.
**Original Fare non-refundable, new fare lower value**
The new Fare is lower but because the original Fare is non-refundable, the remaining value is not refunded (the switch is not on and should not be changed manually).
**Example of Comparison table**
2 taxes are additionally collected – AY and XF (+292).\
2 taxes are refunded (-907), there is ADC for Fare (+468). \
The ADC for Fare can be compensated by the tax refund (907 - 468 = 439), ie. the refund is CZK 439. \
The refunded amount cannot compensate the ADC for taxes, which must be paid every time. \
It means the new ticket will be issued with ADC of CZK 292 and EMD for refundable balance of CZK 439.\
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://cee-systems.gitbook.io/tcp/starting-with-exchange/new-calculation/untitled/modification-in-comparison-table.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.