Why, when submitting a request to the DURS to calculate the real estate turnover tax and capital gains tax, do the clerks request documents that they can themselves request ex officio from the competent authorities. For example: - when the current owner acquired the title and the contracts or, in our case, the inheritance decree - all of which can be obtained from the Land Registry, - the certificate of the intended use of the property (which can be obtained from the competent municipality), - a certificate of when the property changed its use - they can obtain this from the competent municipality).