WASHINGTON (AP) — The Internal Revenue Service said Monday it will contact some 20.5 million people who receive Social Security or Veterans Affairs benefits to ensure they don't miss out on the economic stimulus payment of at least $300.

The tax agency said that starting next week it will begin sending out 10-page packages with filing instructions and a Form 1040A for the filer to complete. The package will go to people who may qualify for the economic stimulus payment enacted by Congress but who normally aren't required to file a tax return.

People must file a return to receive the stimulus benefit which is worth from $300 to $600 for individuals and $600 to $1,200 for couples. Parents will receive an additional $300 for each eligible child under age 17. To qualify, a person must have at least $3,000 in income from earnings and retirement, disability or survivors' benefits.