As noted by "Moscow 24", you can find your polling station on the website of the Central Election Commission of Russia in the section "Digital Services" or on the cartographic service "TECs and PECs on the Map of Russia", in your personal account on the portal of public services in the section "My elections", and also on the mos.ru portal.
Earlier, Dni.ru reported that the online voting system in Moscow has become available for people with visual impairments.