From 2019, the rules of transferring information on employees' income to the tax office have changed.Information on the income of persons employed by natural persons for 2018 should be sent to the tax office by 31 January this year.only in electronic form.The deadline for submitting tax returns PIT-8C, PIT-11, PIT-R and PIT-4R declarations, PIT-8AR to the tax office is January 31, while the IFT-1 / IFT-1R information may be submitted on February 28.