This is the 12310th most frequent Russian word.
ифнс
The Russian word "ИФНС" stands for "Inspectorate of the Federal Tax Service," which is a regional tax authority in Russia.
Here, 'ифнс' refers to the 'tax service'. It is used as the indirect object of the action 'отправил', indicating the entity receiving the report.
Я отправил отчет в ифнс.
I sent the report to the tax service.
In this case, 'ифнс' is used as a possessor, describing the entity that owns the website where the new feature is.
На сайте ифнс появилась новая функция.
A new feature has appeared on the tax service's website.
Here, 'ифнс' is used as a possessive, indicating that the staff who clarified the details are part of the tax service.