OSMI filing requirements by state
State-specific due dates and submission methods for OSMI reporting, including file preparation instructions.
Each state taxing authority sets its own OSMI filing due date and submission method. The following table lists these requirements by state.
Before you submit OSMI data to a state taxing authority, extract the OSMI data file from the downloaded ZIP file using a file compression tool such as WinZip.
note
File OSMI data directly with each state taxing authority using their specified submission method. ONESOURCE Trust Tax doesn’t file OSMI data on your behalf.
State | Due Date | Submission Method | Details |
|---|---|---|---|
CA | June 1 | Online services website | note
Registration is required before you can use SWIFT. Additional details:
|
CT | January 31 | CD-ROM, USB Flash drives, or Secured Email Attachments | Submit the electronic file and completed transmittal Form AU-409 to: Connecticut Department of Revenue Services (DRS) Income Tax Audit Unit Attention: 2019 TEI Data Submission 450 Columbus Blvd-Ste 1 Hartford, CT 06103-1837 Additional details: |
MA | February 28 or March 31 if filed electronically | Online services website | note
Registration is required before you can use MassTaxConnect. Additional details: |
MN | June 1 | Online services website | |
MT | March 31 (electronic filing preferred); due date April 1 | Online services website | TAP File Upload requires pre-registration. Additional details: |
NY | August 31 | Online services website | You must have an Online Services account. Additional details: |
RI | January 31 | Online services website | Additional details: |
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