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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 20-4064644

MEMNOSYNE INSTITUTE

Tax-exempt (reinstated) · DALLAS, TX 75201

What it must file and when

IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990-PF on file
2024December 31, 2024May 15, 2025990-PF on file
2023December 31, 2023May 15, 2024990 on file

IRS record

EIN
20-4064644
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Private non-operating foundation
Donations deductible (Pub 78)
Private foundation, 30% limit
Exempt since
2018
Accounting year ends
December
Files
Form 990-PF
Category (NTEE)
Education (B99)
Reinstated
May 15, 2017

Filing history

FormYear endedRevenueExpensesAssets
990-PFDecember 2025–––
990-PFDecember 2024–––
990December 2023$694,175$626,333$142,974
990December 2022$626,703$639,240$62,927
990December 2021–––
990December 2020–––

990-N: the IRS publishes only the latest e-Postcard per organization; earlier years appear here as 990.tax collects the monthly files. 990, 990-EZ, 990-PF: e-filed returns processed since 2019; amounts from the IRS Statistics of Income extracts where available.

Other organizations in DALLAS