import re
text = '[04.1_Filialy 680031, Khabarovsk Territory, Khabarovsk, ul. District, 6, building b, office 3.] and [04.1_OGRN660050463454]'
text = re.sub(r'\[[\d\.]+_(?:Filialy|MN)([^]]+)\]', r'<address>\1<\\address>', text)
print(text)
aW1wb3J0IHJlCgp0ZXh0ID0gJ1swNC4xX0ZpbGlhbHkgNjgwMDMxLCBLaGFiYXJvdnNrIFRlcnJpdG9yeSwgS2hhYmFyb3ZzaywgdWwuIERpc3RyaWN0LCA2LCBidWlsZGluZyBiLCBvZmZpY2UgMy5dIGFuZCBbMDQuMV9PR1JONjYwMDUwNDYzNDU0XScKdGV4dCA9IHJlLnN1YihyJ1xbW1xkXC5dK18oPzpGaWxpYWx5fE1OKShbXl1dKylcXScsIHInPGFkZHJlc3M+XDE8XFxhZGRyZXNzPicsIHRleHQpCgpwcmludCh0ZXh0KQ==