noun
submitted item; document to submit; assignment
Refers to any item that is to be submitted or has been submitted, such as homework, reports, or official documents. Commonly used in school and office contexts.
明日までに提出物を出してください。
Please submit your assignments by tomorrow.
提出物の期限は来週の金曜日です。
The deadline for submissions is next Friday.
課題 is a task or assignment, often used in academic settings, while 提出物 is the actual submission resulting from that task.
Compound of 提出 (ていしゅつ, 'submission') + 物 (ぶつ, 'thing'). The reading ぶつ is the standard on'yomi for 物 in compound nouns.