change "assign country -> calculation procedure" - how critical for existing company

hello,

we are thinking about a change of the calculation procedure in FI. The reason is, it was assigned many, many years ago and currently calculation procedure of Germany is used for Liechtenstein. We are thinking about a separation and now we are not sure about how critical this change will be. Unfortunately we did not find any information in SAP OSS. Does someone have experiences with changing the calculation procedure in FI with an existing company?

Many thanks

Best regards,

Sandra