§ 220.21 Returns and records; regulations
§ 220.211 Penalties; incomplete return
§ 220.22 Returns; filing requirement
§ 220.221 Returns; signing and verification
§ 220.222 Returns; time and place for filing
§ 220.23 Federal returns
§ 220.24 Declaration of estimated tax
§ 220.241 Declaration; time for filing
§ 220.242 Declaration as return