OK 512S Information

All corporations having an election in effect under Subchapter S of the Internal Revenue Code (IRC) engaged in business or deriving income from property located in Oklahoma and that are required to file a federal income tax return using Form 1120-S, must file a return on Form 512-S.

Link to official form info:

Link to official form info for 512S

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  • Upcoming Due Dates in the Next Year:*
  • Friday Mar 15, 2019
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