Assuming you are not a church, you would file Form 990-EC if you had $100,000 or less in receipts and $250,000 or less in assets. For amounts above that your would file Form 990. If your organization had $1,000 or more gross income from an unrelated business your would file Form 990-T.
Also, if you had less than $25,000 in receipts, you generally would not have a filing requirement.
Sounds like you would not have a filing requirement for last year then since the receipts are less than $25,000. Also, the form stated above should say 990-EZ and not 990-EC.Thank you!